diff --git a/lodash.js b/lodash.js
index 1660fbb09..8e7919acd 100644
--- a/lodash.js
+++ b/lodash.js
@@ -11638,9 +11638,12 @@
      * // => false
      */
     function isFunction(value) {
+      if (!isObject(value)) {
+        return false;
+      }
       // The use of `Object#toString` avoids issues with the `typeof` operator
-      // in Safari 9 which returns 'object' for typed array and other constructors.
-      var tag = isObject(value) ? baseGetTag(value) : '';
+      // in Safari 9 which returns 'object' for typed arrays and other constructors.
+      var tag = baseGetTag(value);
       return tag == funcTag || tag == genTag || tag == proxyTag;
     }