diff --git a/include/wx/mac/carbon/region.h b/include/wx/mac/carbon/region.h
index ce3a08204a..504a944e3b 100644
--- a/include/wx/mac/carbon/region.h
+++ b/include/wx/mac/carbon/region.h
@@ -19,10 +19,6 @@
 class WXDLLEXPORT wxRect;
 class WXDLLEXPORT wxPoint;
 
-enum wxRegionContain {
-    wxOutRegion = 0, wxPartRegion = 1, wxInRegion = 2
-};
-
 // So far, for internal use only
 enum wxRegionOp {
 wxRGN_AND,          // Creates the intersection of the two combined regions.