diff --git a/jsface.js b/jsface.js
index 6a75ba9..09d2fc7 100644
--- a/jsface.js
+++ b/jsface.js
@@ -29,13 +29,6 @@
    */
   function isFunction(obj) { return (obj && typeof obj === "function"); }
 
-  /**
-   * Check an object is a string not.
-   * @param obj object to be checked
-   * @return true if object is a function
-   */
-  function isFunction(obj) { return (obj && typeof obj === "function"); }
-
   /**
    * Check an object is a string not.
    * @param obj object to be checked