diff --git a/src/osx/window_osx.cpp b/src/osx/window_osx.cpp
index 22bb1ed118..a164fdea47 100644
--- a/src/osx/window_osx.cpp
+++ b/src/osx/window_osx.cpp
@@ -2531,7 +2531,7 @@ Rect wxMacGetBoundsForControl( wxWindowMac* window , const wxPoint& pos , const
     int x, y, w, h ;
 
     window->MacGetBoundsForControl( pos , size , x , y, w, h , adjustForOrigin ) ;
-    Rect bounds = { y, x, y + h, x + w };
+    Rect bounds = { static_cast<short>(y), static_cast<short>(x), static_cast<short>(y + h), static_cast<short>(x + w) };
 
     return bounds ;
 }