diff --git a/upb_generator/common/BUILD b/upb_generator/common/BUILD
index ceeabe4..b6c608e 100644
--- a/upb_generator/common/BUILD
+++ b/upb_generator/common/BUILD
@@ -29,6 +29,7 @@
     hdrs = ["cpp_to_upb_def.h"],
     visibility = [
         "//hpb_generator:__subpackages__",
+        "//net/proto2/interop:__subpackages__",
         "//src/google/protobuf/compiler/interop:__subpackages__",
         "//third_party/kotlin/protobuf/generator/native:__subpackages__",
     ],