diff --git a/src/util.h b/src/util.h
index 4a68051a..3d7ef108 100644
--- a/src/util.h
+++ b/src/util.h
@@ -81,10 +81,8 @@ T* alignup(T* p)
     return u.ptr;
 }
 
-#ifndef MSG_NOSIGNAL
-#define MSG_NOSIGNAL        0
-#endif
 #ifdef __WXMSW__
+#define MSG_NOSIGNAL        0
 #define MSG_DONTWAIT        0
 #ifndef UINT64_MAX
 #define UINT64_MAX          _UI64_MAX