diff --git a/headers/posix/stdio.h b/headers/posix/stdio.h
index 30288184f1..b8ae4acfd6 100644
--- a/headers/posix/stdio.h
+++ b/headers/posix/stdio.h
@@ -32,7 +32,10 @@
 
 #define L_ctermid  		32
 #define L_cuserid  		32
+#if (defined(__STDC_VERSION__) && __STDC_VERSION__ < 201112L) \
+	|| (defined(__cplusplus) && __cplusplus < 201402L)
 #define	L_tmpnam		512
+#endif
 
 #define	P_tmpdir		"/tmp/"
 
@@ -160,7 +163,10 @@ extern int		getchar(void);
 extern int		getchar_unlocked(void);
 extern int		fgetc(FILE *stream);
 extern int		fgetc_unlocked(FILE *stream);
+#if (defined(__STDC_VERSION__) && __STDC_VERSION__ < 201112L) \
+	|| (defined(__cplusplus) && __cplusplus < 201402L)
 extern char		*gets(char *buffer);
+#endif
 extern char		*fgets(char *string, int stringLength, FILE *stream);
 extern char		*fgets_unlocked(char *string, int stringLength, FILE *stream);
 
@@ -192,10 +198,13 @@ extern char		*ctermid(char *controllingTerminal);
 extern char		*cuserid(char *s);
 
 /* temporary files */
-extern char		*tempnam(char const *path, char const *prefix);
 extern FILE		*tmpfile(void);
-extern char 	*tmpnam(char *nameBuffer);
 extern char 	*tmpnam_r(char *nameBuffer);
+#if (defined(__STDC_VERSION__) && __STDC_VERSION__ < 201112L) \
+	|| (defined(__cplusplus) && __cplusplus < 201402L)
+extern char		*tempnam(char const *path, char const *prefix);
+extern char 	*tmpnam(char *nameBuffer);
+#endif
 
 #include <stdio_post.h>
 
diff --git a/headers/private/kernel/boot/stdio.h b/headers/private/kernel/boot/stdio.h
index 6ea30e8382..283dfdeac0 100644
--- a/headers/private/kernel/boot/stdio.h
+++ b/headers/private/kernel/boot/stdio.h
@@ -70,7 +70,6 @@ extern void		setbuf (FILE *file, char *buff);
 extern int		setvbuf(FILE *file, char *buff, int mode, size_t size);
 extern int		sscanf(char const *str, char const *format, ...);
 extern FILE		*tmpfile(void);
-extern char 	*tmpnam(char *nameBuffer);
 extern int		ungetc(int c, FILE *stream);
 extern int		vscanf(char const *format, va_list ap);
 extern int		vsscanf(char const *str, char const *format, va_list ap);
@@ -81,7 +80,6 @@ extern char  *fgets(char *, int, FILE *);
 extern int    fputc(int, FILE *);
 extern int    fputs(const char *, FILE*);
 extern int    getc(FILE *);
-extern char  *gets(char *);
 extern int    getw(FILE *);
 extern int    getchar(void);
 extern int    putc(int, FILE *);