diff --git a/basis/cocoa/types/types.factor b/basis/cocoa/types/types.factor
index 6e65bc1a72..0bf4257a0b 100644
--- a/basis/cocoa/types/types.factor
+++ b/basis/cocoa/types/types.factor
@@ -46,6 +46,7 @@ C-STRUCT: NSSize
     { "CGFloat" "h" } ;
 
 TYPEDEF: NSSize _NSSize
+TYPEDEF: NSSize CGSize
 TYPEDEF: NSPoint CGPoint
 
 : <NSSize> ( w h -- size )