diff --git a/src/js/i18n/ui-i18n.js b/src/js/i18n/ui-i18n.js
index 8b0832741e..b071913c04 100644
--- a/src/js/i18n/ui-i18n.js
+++ b/src/js/i18n/ui-i18n.js
@@ -61,7 +61,7 @@
           if (!this._langs[lower]) {
             this._langs[lower] = {};
           }
-          angular.extend(this._langs[lower], strings);
+          angular.merge(this._langs[lower], strings);
         },
         getAllLangs: function () {
           var langs = [];
@@ -301,4 +301,4 @@
   } );
 
 
-})();
\ No newline at end of file
+})();