diff --git a/lib/jutil.js b/lib/jutil.js
index bcab34e6..68b0637b 100644
--- a/lib/jutil.js
+++ b/lib/jutil.js
@@ -66,18 +66,21 @@ exports.mixin = function (newClass, mixinClass, options) {
 };
 
 function mixInto(sourceScope, targetScope, options) {
-  var proxies = [];
-
   Object.keys(sourceScope).forEach(function (propertyName, options) {
     var targetPropertyExists = targetScope.hasOwnProperty(propertyName);
     var sourceProperty = Object.getOwnPropertyDescriptor(sourceScope, propertyName);
     var targetProperty = targetPropertyExists && Object.getOwnPropertyDescriptor(targetScope, propertyName);
     var sourceIsFunc = typeof sourceProperty.value === 'function';
-    var shouldOverride = options.override || !targetPropertyExists || sourceIsFunc;
+    var isFunc = targetPropertyExists && typeof targetProperty.value === 'function';
+    var isDelegate = isFunc && targetProperty.value._delegate;
+    var shouldOverride = options.override || !targetPropertyExists || isDelegate;
 
     if (shouldOverride) {
+      if (sourceIsFunc) {
+        sourceProperty.value = sourceProperty.value;
+      }
+      
       Object.defineProperty(targetScope, propertyName, sourceProperty);
     }
   });
 }
-