diff --git a/include/wx/region.h b/include/wx/region.h
index ee0fd6ac06..f0c7d86ad1 100644
--- a/include/wx/region.h
+++ b/include/wx/region.h
@@ -7,6 +7,8 @@
 #include "wx/motif/region.h"
 #elif defined(__WXGTK__)
 #include "wx/gtk/region.h"
+#elif defined(__WXMGL__)
+#include "wx/mgl/region.h"
 #elif defined(__WXQT__)
 #include "wx/qt/region.h"
 #elif defined(__WXMAC__)