diff --git a/lib/utils.js b/lib/utils.js
index eec6660..4ebd787 100644
--- a/lib/utils.js
+++ b/lib/utils.js
@@ -219,15 +219,13 @@ var Utils = module.exports = {
     force = force || false;
 
     _.forEach(methods, function(method) {
-      if (!_.isFunction(target[method])) {
-        return;
-      }
-
       if (_.isFunction(base[method]) && !force) {
         return;
       }
 
-      base[method] = target[method].bind(target);
+      base[method] = function() {
+        return target[method].apply(target, arguments);
+      };
     });
 
     return base;