diff --git a/lodash.src.js b/lodash.src.js
index cec9e8829..939d1b9ee 100644
--- a/lodash.src.js
+++ b/lodash.src.js
@@ -8697,12 +8697,13 @@
      * _.isFunction(/abc/);
      * // => false
      */
-    var isFunction = !(baseIsFunction(/x/) || (Uint8Array && !baseIsFunction(Uint8Array))) ? baseIsFunction : function(value) {
+    function isFunction(value) {
       // The use of `Object#toString` avoids issues with the `typeof` operator
       // in older versions of Chrome and Safari which return 'function' for regexes
       // and Safari 8 equivalents which return 'object' for typed array constructors.
-      return objToString.call(value) == funcTag;
-    };
+      var type = typeof value;
+      return type == 'function' || (type == 'object' && objToString.call(value) == funcTag);
+    }
 
     /**
      * Checks if `value` is the [language type](https://es5.github.io/#x8) of `Object`.