diff --git a/headers/posix/assert.h b/headers/posix/assert.h
index b47812abdc..6190133e00 100644
--- a/headers/posix/assert.h
+++ b/headers/posix/assert.h
@@ -7,7 +7,7 @@
 #undef assert
 
 #ifndef NDEBUG
-	// defining NDEBUG disables assert() functionality
+	/* defining NDEBUG disables assert() functionality */
 
 #ifdef __cplusplus
 extern "C" {
@@ -26,8 +26,8 @@ extern void __assert_perror_fail(int error, const char *file,
 #define assert(assertion) \
 	((assertion) ? (void)0 : __assert_fail(#assertion, __FILE__, __LINE__, __PRETTY_FUNCTION__))
 
-#else	// NDEBUG
-#	define assert(condition) ;
+#else	/* NDEBUG */
+#	define assert(condition) ((void)0)
 #endif
 
 #endif	/* _ASSERT_H_ */
diff --git a/headers/posix/ctype.h b/headers/posix/ctype.h
index 4bbc7a4117..1263f59df7 100644
--- a/headers/posix/ctype.h
+++ b/headers/posix/ctype.h
@@ -74,4 +74,4 @@ extern const int *__ctype_toupper;
 }
 #endif
 
-#endif // _CTYPE_H
+#endif /* _CTYPE_H */
diff --git a/headers/posix/fcntl.h b/headers/posix/fcntl.h
index c124099a12..b5aeabbb59 100644
--- a/headers/posix/fcntl.h
+++ b/headers/posix/fcntl.h
@@ -53,7 +53,7 @@
 #define O_RSYNC			0x00020000	/* read synchronized I/O file integrity */
 #define O_DSYNC			0x00040000	/* write synchronized I/O data integrity */
 
-// TODO: currently not implemented additions:
+/* TODO: currently not implemented additions: */
 #define O_NOFOLLOW		0x00080000
 	/* should we implement this? it's similar to O_NOTRAVERSE but will fail on symlinks */
 #define O_NOCACHE		0x00100000	/* doesn't use the file system cache if possible */
diff --git a/headers/posix/inttypes.h b/headers/posix/inttypes.h
index 05809495e4..a488f0d180 100644
--- a/headers/posix/inttypes.h
+++ b/headers/posix/inttypes.h
@@ -204,8 +204,8 @@ extern imaxdiv_t	imaxdiv(intmax_t numer, intmax_t denom);
 
 extern intmax_t		strtoimax(const char *string, char **_end, int base);
 extern uintmax_t	strtoumax(const char *string, char **_end, int base);
-//extern intmax_t		wcstoimax(const __wchar_t *, __wchar_t **, int);
-//extern uintmax_t	wcstoumax(const __wchar_t *, __wchar_t **, int);
+/* extern intmax_t		wcstoimax(const __wchar_t *, __wchar_t **, int); */
+/* extern uintmax_t	wcstoumax(const __wchar_t *, __wchar_t **, int); */
 
 #ifdef __cplusplus
 }
diff --git a/headers/posix/libio.h b/headers/posix/libio.h
index e24f8f862f..83caf1d45e 100644
--- a/headers/posix/libio.h
+++ b/headers/posix/libio.h
@@ -138,7 +138,7 @@ typedef struct _IO_FILE {
 	struct _IO_FILE *_chain;
 
 	int		_fileno;
-//	int		_blksize;
+/*	int		_blksize; */
 	int		_flags2;
 	off_t	_old_offset; /* This used to be _offset but it's too small. */
 		/* -> not true on BeOS, but who cares */
@@ -151,14 +151,14 @@ typedef struct _IO_FILE {
 	_IO_lock_t *_lock;
 
 	off_t	_offset;
-//#if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T
+/* #if defined _LIBC || defined _GLIBCPP_USE_WCHAR_T */
 	/* Wide character stream stuff.  */
 	struct _IO_codecvt *_codecvt;
 	struct _IO_wide_data *_wide_data;
-//#else
-//	void	*__pad1;
-//	void	*__pad2;
-//#endif
+/* #else
+ *	void	*__pad1;
+ *	void	*__pad2;
+ * #endif */
 	int _mode;
 	/* Make sure we don't get into trouble again.  */
 	char _unused2[15 * sizeof (int) - 2 * sizeof (void *)];
diff --git a/headers/posix/limits.h b/headers/posix/limits.h
index 47fa9af3b0..4816906170 100644
--- a/headers/posix/limits.h
+++ b/headers/posix/limits.h
@@ -1,6 +1,6 @@
 #ifndef _LIBC_LIMITS_H_
 #define _LIBC_LIMITS_H_
-	// Note: The header guard is checked in gcc's limits.h.
+	/* Note: The header guard is checked in gcc's limits.h. */
 
 #include <float.h>		/* for DBL_DIG, FLT_DIG, etc */
 
diff --git a/headers/posix/math.h b/headers/posix/math.h
index 4eb65bd227..4d4a25679d 100644
--- a/headers/posix/math.h
+++ b/headers/posix/math.h
@@ -34,7 +34,7 @@
 #define __huge_valf_t	union { unsigned char __c[4]; long __l; float __f; }
 #define HUGE_VALF		(((__huge_valf_t) { __l: __HUGE_VALF_v }).__f)
 
-// ToDo: define HUGE_VALL for long doubles
+/* ToDo: define HUGE_VALL for long doubles */
 
 #define __NAN_VALF_v	0x7fc00000L
 #define NAN				(((__huge_valf_t) { __l: __NAN_VALF_v }).__f)
@@ -146,7 +146,7 @@ extern double	trunc(double x);
 extern long double	roundl(long double x);
 extern long		lroundl(long double x);
 
-// TODO: add and fix those!
+/* TODO: add and fix those! */
 extern /*long*/ double	lgamma(/*long*/ double x);
 
 /* some BSD non-ANSI or POSIX math functions */
diff --git a/headers/posix/net/route.h b/headers/posix/net/route.h
index fce5524716..f164359b61 100644
--- a/headers/posix/net/route.h
+++ b/headers/posix/net/route.h
@@ -20,8 +20,8 @@
 #define RTF_BLACKHOLE	0x00001000
 #define RTF_LOCAL		0x00200000
 
-// This structure is used to pass routes to and from the network stack
-// (via struct ifreq)
+/* This structure is used to pass routes to and from the network stack
+ * (via struct ifreq) */
 
 struct route_entry {
 	struct sockaddr	*destination;
diff --git a/headers/posix/netinet/in.h b/headers/posix/netinet/in.h
index da580fdfb5..13a6325d0b 100644
--- a/headers/posix/netinet/in.h
+++ b/headers/posix/netinet/in.h
@@ -22,7 +22,7 @@ typedef uint32_t in_addr_t;
  * and we are not allowed to import all the BeOS types here.
  */
 #ifndef htonl
-//	extern uint32_t __swap_int32(uint32_t);	/* private */
+/*	extern uint32_t __swap_int32(uint32_t); */	/* private */
 	extern unsigned long __swap_int32(unsigned long);	/* private */
 	extern uint16_t __swap_int16(uint16_t);	/* private */
 	#if 	BYTE_ORDER == LITTLE_ENDIAN
diff --git a/headers/posix/netinet/ip_var.h b/headers/posix/netinet/ip_var.h
index b59e9dda35..ff8cc26633 100644
--- a/headers/posix/netinet/ip_var.h
+++ b/headers/posix/netinet/ip_var.h
@@ -138,7 +138,7 @@ struct  ipstat {
         int32_t  ips_outhwcsum;          /* hardware checksummed on output */
 };
 
-//#ifdef _KERNEL_MODE
+/* #ifdef _KERNEL_MODE */
 
 #define IP_FORWARDING			0x1				/* most of ip header exists */
 #define IP_ALLOWBROADCAST		SO_BROADCAST	/* can send broadcast packets */
@@ -147,7 +147,7 @@ struct  ipstat {
 #define IP_MTUDISC				0x10			/* pmtu discovery, set DF */
 
 #if 0
-//struct ipstat ipstat;
+/* struct ipstat ipstat; */
 
 void  ipv4_input(struct mbuf *, int);
 int   ipv4_output(struct mbuf *, struct mbuf *, struct route *, int, void *);
diff --git a/headers/posix/pthread.h b/headers/posix/pthread.h
index 4e34de2952..8893ace9b7 100644
--- a/headers/posix/pthread.h
+++ b/headers/posix/pthread.h
@@ -72,7 +72,7 @@ enum pthread_process_shared {
 #define PTHREAD_PRIO_INHERIT		1
 #define PTHREAD_PRIO_PROTECT		2
 
-//extern pthread_mutexattr_t pthread_mutexattr_default;
+/* extern pthread_mutexattr_t pthread_mutexattr_default; */
 
 /* private structure */
 struct __pthread_cleanup_handler {
@@ -176,13 +176,13 @@ extern int pthread_attr_setstacksize(pthread_attr_t *attr, size_t stacksize);
 
 #if 0	/* Unimplemented attribute functions: */
 
-// mandatory!
+/* mandatory! */
 extern int pthread_attr_getschedparam(const pthread_attr_t *attr,
 	struct sched_param *param);
 extern int pthread_attr_setschedparam(pthread_attr_t *attr,
 	const struct sched_param *param);
 
-// [TPS]
+/* [TPS] */
 extern int pthread_attr_getinheritsched(const pthread_attr_t *attr,
 	int *inheritsched);
 extern int pthread_attr_setinheritsched(pthread_attr_t *attr, int inheritsched);
@@ -194,17 +194,17 @@ extern int pthread_attr_getscope(const pthread_attr_t *attr,
 	int *contentionscope);
 extern int pthread_attr_setscope(pthread_attr_t *attr, int contentionscope);
 
-// [XSI]
+/* [XSI] */
 extern int pthread_attr_getguardsize(const pthread_attr_t *attr,
 	size_t *guardsize);
 extern int pthread_attr_setguardsize(pthread_attr_t *attr, size_t guardsize);
 
-// [TSA]
+/* [TSA] */
 extern int pthread_attr_getstackaddr(const pthread_attr_t *attr,
 	void **stackaddr);
 extern int pthread_attr_setstackaddr(pthread_attr_t *attr, void *stackaddr);
 
-// [TSA TSS]
+/* [TSA TSS] */
 extern int pthread_attr_getstack(const pthread_attr_t *attr,
 	void **stackaddr, size_t *stacksize);
 extern int pthread_attr_setstack(pthread_attr_t *attr, void *stackaddr, size_t stacksize);
diff --git a/headers/posix/setjmp.h b/headers/posix/setjmp.h
index 2dc43c5b87..cd5877dacf 100644
--- a/headers/posix/setjmp.h
+++ b/headers/posix/setjmp.h
@@ -7,7 +7,7 @@
 
 #include <signal.h>
 
-// include architecture specific definitions
+/* include architecture specific definitions */
 #ifdef __INTEL__
 	#include <arch/x86/arch_setjmp.h>
 #elif __POWERPC__
diff --git a/headers/posix/shadow.h b/headers/posix/shadow.h
index 0b660d8e53..d57c5ad0e9 100644
--- a/headers/posix/shadow.h
+++ b/headers/posix/shadow.h
@@ -49,4 +49,4 @@ extern int fgetspent_r(FILE* file, struct spwd* spwd, char* buffer,
 #endif
 
 
-#endif	// _SHADOW_H_
+#endif	/* _SHADOW_H_ */
diff --git a/headers/posix/signal.h b/headers/posix/signal.h
index aa04e4a256..d516cd9e2d 100644
--- a/headers/posix/signal.h
+++ b/headers/posix/signal.h
@@ -25,9 +25,9 @@ typedef void (*__signal_func_ptr)(int);
 #define SIG_ERR		((sighandler_t)-1)	/* an error occurred during signal processing */
 #define SIG_HOLD	((sighandler_t)3)	/* the signal was hold */
 
-// TODO: Support this structure, or more precisely the SA_SIGINFO flag. To do
-// this properly we need real-time signal support. Both are commented out for
-// the time being to not make "configure" scripts think we do support them.
+/* TODO: Support this structure, or more precisely the SA_SIGINFO flag. To do
+ * this properly we need real-time signal support. Both are commented out for
+ * the time being to not make "configure" scripts think we do support them. */
 #if 0
 typedef struct {
 	int		si_signo;	/* signal number */
@@ -61,7 +61,7 @@ struct sigaction {
 #define SA_NODEFER		0x08
 #define SA_RESTART		0x10
 #define SA_ONSTACK		0x20
-//#define SA_SIGINFO		0x40
+/* #define SA_SIGINFO		0x40 */
 #define SA_NOMASK		SA_NODEFER
 #define SA_STACK		SA_ONSTACK
 #define SA_ONESHOT		SA_RESETHAND
@@ -248,7 +248,7 @@ int		pthread_sigmask(int how, const sigset_t *set, sigset_t *oset);
 
 typedef struct vregs vregs;
 
-// include architecture specific definitions
+/* include architecture specific definitions */
 #ifdef __INTEL__
         #include <arch/x86/signal.h>
 #elif __POWERPC__
diff --git a/headers/posix/size_t.h b/headers/posix/size_t.h
index d76a0b2d01..0662047f6a 100644
--- a/headers/posix/size_t.h
+++ b/headers/posix/size_t.h
@@ -7,7 +7,7 @@
 
 #include <stddef.h>
 
-// TODO: ATM gcc's stddef.h defines ssize_t for BeOS.h. We should fix this.
-//typedef long signed int		ssize_t;
+/* TODO: ATM gcc's stddef.h defines ssize_t for BeOS.h. We should fix this.
+ * typedef long signed int		ssize_t; */
 
 #endif /* _SIZE_T_H_ */
diff --git a/headers/posix/stdint.h b/headers/posix/stdint.h
index c6a29ec376..693862cf22 100644
--- a/headers/posix/stdint.h
+++ b/headers/posix/stdint.h
@@ -131,7 +131,7 @@ typedef unsigned long long uintmax_t;
 
 #if !defined(__cplusplus) || defined(__STDC_CONSTANT_MACROS)
 
-// Macros of Integer Constant Expressions
+/* Macros of Integer Constant Expressions */
 #define INT8_C(value) 	value
 #define INT16_C(value) 	value
 #define INT32_C(value) 	value
@@ -142,7 +142,7 @@ typedef unsigned long long uintmax_t;
 #define UINT32_C(value) value ## U
 #define UINT64_C(value) value ## ULL
 
-// Macros for greatest-width integer constant expressions
+/* Macros for greatest-width integer constant expressions */
 #define INTMAX_C(value) 	value ## LL
 #define UINTMAX_C(value) 	value ## ULL
 
diff --git a/headers/posix/stdio.h b/headers/posix/stdio.h
index 9dc66b41f7..02ccc00c81 100644
--- a/headers/posix/stdio.h
+++ b/headers/posix/stdio.h
@@ -10,8 +10,8 @@
 #include <stdarg.h>
 
 
-// Dodge gcc 2.95.3's fixincludes hack stdio_va_list by including this string:
-// __gnuc_va_list
+/* Dodge gcc 2.95.3's fixincludes hack stdio_va_list by including this string:
+ * __gnuc_va_list */
 
 
 #define BUFSIZ			1024
diff --git a/headers/posix/stdio_post.h b/headers/posix/stdio_post.h
index 7418063371..8ce3b2b518 100644
--- a/headers/posix/stdio_post.h
+++ b/headers/posix/stdio_post.h
@@ -4,11 +4,11 @@
 #ifndef _STDIO_POST_H_
 #define _STDIO_POST_H_
 
-// "Private"/inline functions of our BeOS compatible stdio implementation
+/* "Private"/inline functions of our BeOS compatible stdio implementation */
 
-// ToDo: this is a work in progress to make our stdio
-//		BeOS' GNU/libio (almost) binary compatible
-//		We may not yet be compatible!
+/* ToDo: this is a work in progress to make our stdio
+ *		BeOS' GNU/libio (almost) binary compatible
+ *		We may not yet be compatible! */
 
 #ifndef _STDIO_H_
 #	error "This file must be included from stdio.h!"
@@ -19,9 +19,9 @@ extern "C" {
 #endif
 
 extern char _single_threaded;
-	// this boolean value is true (1) if there is only the main thread
-	// running - as soon as you spawn the first thread, it's set to
-	// false (0)
+	/* this boolean value is true (1) if there is only the main thread
+	 * running - as soon as you spawn the first thread, it's set to
+	 * false (0) */
 
 #ifdef __cplusplus
 }
diff --git a/headers/posix/string.h b/headers/posix/string.h
index bc1b61f5ac..4800735cb4 100644
--- a/headers/posix/string.h
+++ b/headers/posix/string.h
@@ -37,7 +37,7 @@ extern char		*strrchr(const char *string, int character);
 extern char		*strstr(const char *string, const char *searchString);
 
 extern char		*strchrnul(const char *string, int character);
-	// this is a GNU extension
+	/* this is a GNU extension */
 
 extern char		*strpbrk(const char *string, const char *set);
 extern char		*strtok(char *string, const char *set);
@@ -66,10 +66,10 @@ extern size_t	strlcpy(char *dest, const char *source, size_t length);
 
 extern size_t	strnlen(const char *string, size_t count);
 
-//extern char		*strlwr(char *string);
-//extern char		*strupr(char *string);
+/* extern char		*strlwr(char *string); */
+/* extern char		*strupr(char *string); */
 
-//extern char		*strsep(char **stringPointer, const char *delimiter);
+/* extern char		*strsep(char **stringPointer, const char *delimiter); */
 
 extern const char	*strsignal(int signal);
 
diff --git a/headers/posix/sys/mman.h b/headers/posix/sys/mman.h
index 40c98c74d4..02ea94d2ba 100644
--- a/headers/posix/sys/mman.h
+++ b/headers/posix/sys/mman.h
@@ -9,20 +9,20 @@
 #include <sys/types.h>
 
 
-// memory protection for mmap() and others
+/* memory protection for mmap() and others */
 #define PROT_READ		0x01
 #define PROT_WRITE		0x02
 #define PROT_EXEC		0x04
 #define PROT_NONE		0x00
 
-// mmap() flags
+/* mmap() flags */
 #define MAP_SHARED		0x01			/* changes are seen by others */
 #define MAP_PRIVATE		0x02			/* changes are only seen by caller */
 #define MAP_FIXED		0x04			/* require mapping to specified addr */
 #define MAP_ANONYMOUS	0x08			/* no underlying object */
 #define MAP_ANON		MAP_ANONYMOUS
 
-// mmap() error return code
+/* mmap() error return code */
 #define MAP_FAILED		((void*)-1)
 
 
@@ -38,4 +38,4 @@ int		shm_unlink(const char* name);
 __END_DECLS
 
 
-#endif	// _SYS_MMAN_H
+#endif	/* _SYS_MMAN_H */
diff --git a/headers/posix/sys/poll.h b/headers/posix/sys/poll.h
index 353c3073d8..c727ab04de 100644
--- a/headers/posix/sys/poll.h
+++ b/headers/posix/sys/poll.h
@@ -7,7 +7,7 @@
 
 
 #include <poll.h>
-	// for compatibility with legacy applications
+	/* for compatibility with legacy applications */
 
 
 #endif	/* _SYS_POLL_H */
diff --git a/headers/posix/sys/resource.h b/headers/posix/sys/resource.h
index 05dbba4770..403e9c25a1 100644
--- a/headers/posix/sys/resource.h
+++ b/headers/posix/sys/resource.h
@@ -17,7 +17,7 @@ struct rlimit {
 	rlim_t	rlim_max;		/* hard limit */
 };
 
-// ToDo: the only supported mode is RLIMIT_NOFILE right now
+/* ToDo: the only supported mode is RLIMIT_NOFILE right now */
 #define RLIMIT_CORE		0	/* size of the core file */
 #define RLIMIT_CPU		1	/* CPU time per team */
 #define	RLIMIT_DATA		2	/* data segment size */
@@ -62,9 +62,9 @@ extern int getrusage(int who, struct rusage *rusage);
 extern int getrlimit(int resource, struct rlimit * rlp);
 extern int setrlimit(int resource, const struct rlimit * rlp);
 
-// ToDo: The following POSIX calls are missing (in BeOS as well):
-//int getpriority(int which, id_t who);
-//int setpriority(int which, id_t who, int priority);
+/* ToDo: The following POSIX calls are missing (in BeOS as well):
+ * int getpriority(int which, id_t who);
+ * int setpriority(int which, id_t who, int priority); */
 
 #ifdef __cplusplus
 }
diff --git a/headers/posix/sys/stat.h b/headers/posix/sys/stat.h
index fccd7c1baf..a3110e1e06 100644
--- a/headers/posix/sys/stat.h
+++ b/headers/posix/sys/stat.h
@@ -24,10 +24,10 @@ struct stat {
 	time_t			st_ctime;		/* last change time, not creation time */
 	time_t			st_crtime;		/* creation time */
 
-	// Haiku extensions:
-	// TODO: we might also define special types for files and TTYs
-	// TODO: we should find another solution for this, as BStatable::GetStat()
-	//		can only retrieve the R5 stat structure
+	/* Haiku extensions:
+	 * TODO: we might also define special types for files and TTYs
+	 * TODO: we should find another solution for this, as BStatable::GetStat()
+	 *		can only retrieve the R5 stat structure */
 	unsigned int	st_type;		/* attribute/index type */
 };
 
@@ -110,13 +110,13 @@ extern int    mkdir(const char *path, mode_t mode);
 extern int    mkfifo(const char *path, mode_t mode);
 extern mode_t umask(mode_t cmask);
 
-// This achieves backwards compatibility with R5
-#if 0 //def HAIKU_TARGET_PLATFORM_HAIKU
+/* This achieves backwards compatibility with R5 */
+#if 0 /* def HAIKU_TARGET_PLATFORM_HAIKU */
 #define stat(fd, st) _stat(fd, st, sizeof(struct stat))
 #define fstat(fd, st) _fstat(fd, st, sizeof(struct stat))
 #define lstat(fd, st) _lstat(fd, st, sizeof(struct stat))
 #else
-// ... and this fixes the build for R5 for now
+/* ... and this fixes the build for R5 for now */
 extern int    stat(const char *path, struct stat *st);
 extern int    fstat(int fd, struct stat *st);
 extern int    lstat(const char *path, struct stat *st);
diff --git a/headers/posix/sys/wait.h b/headers/posix/sys/wait.h
index 876bf0bddb..e6b75775af 100644
--- a/headers/posix/sys/wait.h
+++ b/headers/posix/sys/wait.h
@@ -27,8 +27,8 @@
 #define WIFCORED(value)		((value) & 0x10000)
 #define WIFCONTINUED(value)	((value) & 0x20000)
 
-// TODO: waitid() is part of the real-time signal extension. Uncomment when
-// implemented!
+/* TODO: waitid() is part of the real-time signal extension. Uncomment when
+ * implemented! */
 #if 0
 /* ID types for waitid() */
 typedef enum {
@@ -36,7 +36,7 @@ typedef enum {
 	P_PID,		/* wait for the child whose process ID matches */
 	P_PGID		/* wait for any child whose process group ID matches */
 } idtype_t;
-#endif	// 0
+#endif	/* 0 */
 
 
 #ifdef __cplusplus
@@ -45,7 +45,7 @@ extern "C" {
 
 extern pid_t wait(int *_status);
 extern pid_t waitpid(pid_t pid, int *_status, int options);
-//extern int waitid(idtype_t idType, id_t id, siginfo_t *info, int options);
+/* extern int waitid(idtype_t idType, id_t id, siginfo_t *info, int options); */
 
 #ifdef __cplusplus
 }
diff --git a/headers/posix/unistd.h b/headers/posix/unistd.h
index 31823f74f3..bebe2be9eb 100644
--- a/headers/posix/unistd.h
+++ b/headers/posix/unistd.h
@@ -208,7 +208,7 @@ extern void 	swab(const void *src, void *dest, ssize_t nbytes);
 extern char *optarg;
 extern int optind, opterr, optopt;
 
-// ToDo: should be moved to stdlib.h
+/* ToDo: should be moved to stdlib.h */
 extern char **environ;
 
 #ifdef __cplusplus
diff --git a/headers/posix/wchar.h b/headers/posix/wchar.h
index 6aa23938f8..8bfe47fe4a 100644
--- a/headers/posix/wchar.h
+++ b/headers/posix/wchar.h
@@ -10,8 +10,8 @@
 #include <stddef.h>
 #include <stdio.h>
 
-// stddef.h is not supposed to define wint_t, but gcc 2.95.3's one does.
-// In all other cases we will do that.
+/* stddef.h is not supposed to define wint_t, but gcc 2.95.3's one does.
+ * In all other cases we will do that. */
 #ifndef _WINT_T
 #define _WINT_T
 
@@ -21,7 +21,7 @@
 
 typedef __WINT_TYPE__ wint_t;
 
-#endif	// _WINT_T
+#endif	/* _WINT_T */
 
 typedef int wctype_t;
 
diff --git a/headers/posix/wchar_t.h b/headers/posix/wchar_t.h
index 9572a62dc1..a0b06afdb1 100644
--- a/headers/posix/wchar_t.h
+++ b/headers/posix/wchar_t.h
@@ -3,5 +3,5 @@
  * Distributed under the terms of the MIT License.
  */
 
-// Include GCC's stddef.h. It defines wchar_t.
+/* Include GCC's stddef.h. It defines wchar_t. */
 #include <stddef.h>