diff --git a/src/common/graphcmn.cpp b/src/common/graphcmn.cpp
index 65a5dd067f..16e83757db 100644
--- a/src/common/graphcmn.cpp
+++ b/src/common/graphcmn.cpp
@@ -34,6 +34,10 @@
 
 #if wxUSE_GRAPHICS_CONTEXT
 
+#if !defined(wxMAC_USE_CORE_GRAPHICS_BLEND_MODES)
+#define wxMAC_USE_CORE_GRAPHICS_BLEND_MODES 0
+#endif
+
 //-----------------------------------------------------------------------------
 // constants
 //-----------------------------------------------------------------------------