diff --git a/upb/util/BUILD b/upb/util/BUILD
index 2562140b14..a55f018e62 100644
--- a/upb/util/BUILD
+++ b/upb/util/BUILD
@@ -25,7 +25,7 @@ proto_library(
         "def_to_proto_public_import_test.proto",
         "def_to_proto_regular_import_test.proto",
         "def_to_proto_test.proto",
-        "def_to_proto_weak_import_test.proto",
+        "def_to_proto_weak_import_test.proto",  # copybara:strip_for_google3
     ],
 )