diff --git a/lib/class.js b/lib/class.js
index 26cd973..716b6d8 100644
--- a/lib/class.js
+++ b/lib/class.js
@@ -99,9 +99,7 @@ var extend = ( function( extending )
             property: function( name, value )
             {
                 properties[ name ] = value;
-
-                // also add to prototype
-                prototype[ name ] = value;
+                this.performDefault( name, value );
             },
         } );