diff --git a/include/wx/overlay.h b/include/wx/overlay.h
index c48639ee85..831fd8f1ba 100644
--- a/include/wx/overlay.h
+++ b/include/wx/overlay.h
@@ -14,7 +14,7 @@
 
 #include "wx/defs.h"
 
-#if wxOSX_USE_CARBON
+#if defined(__WXMAC__) && wxOSX_USE_CARBON
     #define wxHAS_NATIVE_OVERLAY 1
 #elif defined(__WXDFB__)
     #define wxHAS_NATIVE_OVERLAY 1