diff --git a/lodash.js b/lodash.js
index c1227b234..6cd4623aa 100644
--- a/lodash.js
+++ b/lodash.js
@@ -1990,7 +1990,7 @@
      */
     function hashHas(key) {
       var data = this.__data__;
-      return nativeCreate ? data[key] !== undefined : hasOwnProperty.call(data, key);
+      return nativeCreate ? (data[key] !== undefined) : hasOwnProperty.call(data, key);
     }
 
     /**