diff --git a/WORKSPACE b/WORKSPACE
index 20ad5c7..218b0b2 100644
--- a/WORKSPACE
+++ b/WORKSPACE
@@ -53,6 +53,7 @@ http_archive(
     ],
 )
 
+# TODO(https://github.com/protocolbuffers/protobuf/issues/5918: Remove when protobuf releases protobuf_deps.bzl)
 http_archive(
     name = "net_zlib",
     build_file = "@com_google_protobuf//examples:third_party/zlib.BUILD",