diff --git a/headers/posix/sys/wait.h b/headers/posix/sys/wait.h
index 6b3217309b..8bb44ce36e 100644
--- a/headers/posix/sys/wait.h
+++ b/headers/posix/sys/wait.h
@@ -6,6 +6,7 @@
 #define _SYS_WAIT_H
 
 
+#include <features.h>
 #include <sys/types.h>
 #include <signal.h>
 
@@ -25,9 +26,14 @@
 #define WTERMSIG(value)		(((value) >> 8) & 0xff)
 #define WIFSTOPPED(value)	((((value) >> 16) & 0xff) != 0)
 #define WSTOPSIG(value)		(((value) >> 16) & 0xff)
-#define WIFCORED(value)		((value) & 0x10000)
+#define WCOREDUMP(value)	((value) & 0x10000)
 #define WIFCONTINUED(value)	((value) & 0x20000)
 
+#ifdef _DEFAULT_SOURCE
+/* non-standard macro for backwards compatibility */
+#define WIFCORED(value)		WCOREDUMP(value)
+#endif
+
 /* ID types for waitid() */
 typedef enum {
 	P_ALL,		/* wait for any children, ignore ID */
diff --git a/src/system/libroot/posix/sys/wait.cpp b/src/system/libroot/posix/sys/wait.cpp
index d8dd5b025c..e5f5487b3d 100644
--- a/src/system/libroot/posix/sys/wait.cpp
+++ b/src/system/libroot/posix/sys/wait.cpp
@@ -54,7 +54,7 @@ _waitpid(pid_t pid, int* _status, int options, team_usage_info *usage_info)
 			case CLD_DUMPED:
 				// fill in signal for WIFSIGNALED() and WTERMSIG()
 				status = (info.si_status << 8) & 0xff00;
-				// if core dumped, set flag for WIFCORED()
+				// if core dumped, set flag for WCOREDUMP()
 				if (info.si_code == CLD_DUMPED)
 					status |= 0x10000;
 				break;