diff --git a/services/sync/modules/wrap.js b/services/sync/modules/wrap.js
index b6501cbff150..72491ce8b85f 100644
--- a/services/sync/modules/wrap.js
+++ b/services/sync/modules/wrap.js
@@ -118,7 +118,7 @@ let Wrap = {
       let ret;
       let args = Array.prototype.slice.call(arguments);
 
-      let ret = this.lock();
+      ret = this.lock();
       if (!ret)
         throw "Could not acquire lock";