diff --git a/src/osx/carbon/region.cpp b/src/osx/carbon/region.cpp
index 99a9875516..6f703117da 100644
--- a/src/osx/carbon/region.cpp
+++ b/src/osx/carbon/region.cpp
@@ -16,6 +16,7 @@
 
 #ifndef WX_PRECOMP
     #include "wx/gdicmn.h"
+    #include "wx/dcmemory.h"
 #endif
 
 #include "wx/osx/private.h"