1 files changed, 4 insertions, 0 deletions

diff --git a/fmacros.h b/fmacros.h
index 21cd9cf..799c12c 100644
--- a/fmacros.h
+++ b/fmacros.h
@@ -13,4 +13,8 @@
 #define _XOPEN_SOURCE
 #endif
 
+#if __APPLE__ && __MACH__
+#define _OSX
+#endif
+
 #endif