diff --git a/lib/util.js b/lib/util.js
index 74dc99e..4ea2904 100644
--- a/lib/util.js
+++ b/lib/util.js
@@ -210,7 +210,7 @@ exports.propParse = function( data, options )
             callback_setter.call( callback_setter, name, setter );
         }
         // method
-        else if ( ( value instanceof Function ) || ( keywords['abstract'] ) )
+        else if ( value instanceof Function )
         {
             callback_method.call(
                 callback_method,