diff --git a/lib/class.js b/lib/class.js
index ad830b0..b4dc493 100644
--- a/lib/class.js
+++ b/lib/class.js
@@ -398,7 +398,7 @@ var implement = function()
         util.propParse( arg.prototype, {
             method: function( name, func, is_abstract, keywords )
             {
-                dest[ name ]  = func;
+                dest[ 'abstract ' + name ] = func.definition;
                 make_abstract = true;
             },
         } );