diff --git a/toolkit/components/passwordmgr/storage-mozStorage.js b/toolkit/components/passwordmgr/storage-mozStorage.js
index 7ee7eb50894..1e58ebb7658 100644
--- a/toolkit/components/passwordmgr/storage-mozStorage.js
+++ b/toolkit/components/passwordmgr/storage-mozStorage.js
@@ -1634,8 +1634,9 @@ LoginManagerStorage_mozStorage.prototype = {
         }
 
         // Finalize all statements to free memory, avoid errors later
-        for each (let stmt in this._dbStmts)
+        for each (let stmt in this._dbStmts) {
             stmt.finalize();
+        }
         this._dbStmts = {};
 
         // Close the connection, ignore 'already closed' error