diff --git a/src/osx/window_osx.cpp b/src/osx/window_osx.cpp
index 72e3203879..f9016f4511 100644
--- a/src/osx/window_osx.cpp
+++ b/src/osx/window_osx.cpp
@@ -1875,6 +1875,7 @@ bool wxWindowMac::MacDoRedraw( long time )
             break;
 
         case wxBG_STYLE_PAINT:
+        case wxBG_STYLE_TRANSPARENT:
             // nothing to do, user-defined EVT_PAINT handler will overwrite the
             // entire window client area
             break;