diff --git a/src/MessageReader.h b/src/MessageReader.h
index 97897e61bd..3c8e183885 100644
--- a/src/MessageReader.h
+++ b/src/MessageReader.h
@@ -55,6 +55,7 @@ class MessageReader : private WireDecoder {
   bool Run();
 
   using WireDecoder::set_proto_rev;
+  using WireDecoder::proto_rev;
   using WireDecoder::Reset;
   using WireDecoder::error;
 
diff --git a/src/MessageWriter.h b/src/MessageWriter.h
index 88e4775458..d21a96e197 100644
--- a/src/MessageWriter.h
+++ b/src/MessageWriter.h
@@ -21,6 +21,7 @@ class MessageWriter : private WireEncoder {
   ~MessageWriter();
 
   using WireEncoder::set_proto_rev;
+  using WireEncoder::proto_rev;
   using WireEncoder::Reset;
   using WireEncoder::error;
   using WireEncoder::data;