diff --git a/src/locale/format.js b/src/locale/format.js
index 93e3c34..59aba11 100644
--- a/src/locale/format.js
+++ b/src/locale/format.js
@@ -7,7 +7,10 @@
 const RE_NARGS = /(%|)\{([0-9a-zA-Z_]+)\}/g;
 
 export default function(Vue) {
-    const { hasOwn } = Vue.util;
+    // const { hasOwn } = Vue.util;
+    function hasOwn (obj, key) {
+        return Object.prototype.hasOwnProperty.call(obj, key);
+    }
 
     /**
      * template
--
libgit2 0.21.4