diff --git a/lodash.js b/lodash.js
index bd260e052..44149331c 100644
--- a/lodash.js
+++ b/lodash.js
@@ -6977,8 +6977,9 @@
      */
     function createCallback(func, thisArg, argCount) {
       var type = typeof func;
-      if (func == null || type == 'function') {
-        return baseCreateCallback(func, thisArg, argCount);
+      if (type == 'function' || func == null) {
+        return (typeof thisArg == 'undefined' || !('prototype' in func)) &&
+          func || baseCreateCallback(func, thisArg, argCount);
       }
       // handle "_.pluck" and "_.where" style callback shorthands
       return type != 'object' ? property(func) : match(func);