diff --git a/polygerrit-ui/app/BUILD b/polygerrit-ui/app/BUILD
index 30d72cb6a7..7c12fa27a2 100644
--- a/polygerrit-ui/app/BUILD
+++ b/polygerrit-ui/app/BUILD
@@ -53,7 +53,7 @@ closure_js_binary(
         "--polymer_pass",
         "--jscomp_off=duplicate",
     ],
-    language = "ECMASCRIPT5_STRICT",
+    language = "ECMASCRIPT5",
     deps = [":closure_lib"],
 )