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-rw-r--r--rts/PosixSource.h8
1 files changed, 2 insertions, 6 deletions
diff --git a/rts/PosixSource.h b/rts/PosixSource.h
index b3da60fe37..23101ea470 100644
--- a/rts/PosixSource.h
+++ b/rts/PosixSource.h
@@ -11,12 +11,8 @@
#include <ghcplatform.h>
-#define _POSIX_SOURCE 1
-#define _POSIX_C_SOURCE 199506L
-#define _XOPEN_SOURCE 500
-#define _ISOC99_SOURCE
-
-/* Let's be ISO C99 too... */
+#define _POSIX_C_SOURCE 200112L
+#define _XOPEN_SOURCE 600
#if defined(darwin_HOST_OS)
/* If we don't define this the including sysctl breaks with things like