diff --git a/fmacros.h b/fmacros.h
index 405be20aa..38f46482a 100644
--- a/fmacros.h
+++ b/fmacros.h
@@ -2,7 +2,13 @@
 #define _REDIS_FMACRO_H
 
 #define _BSD_SOURCE
+
+#ifdef __linux__
 #define _XOPEN_SOURCE 700
+#else
+#define _XOPEN_SOURCE
+#endif
+
 #define _LARGEFILE_SOURCE
 #define _FILE_OFFSET_BITS 64