diff --git a/include/grpc/impl/codegen/grpc_types.h b/include/grpc/impl/codegen/grpc_types.h
index 750d9b806e96fc4b0d0d643501c5a6b75e380ca6..da1bd9dcbf0415463f2b5b8168fc1e48f6998866 100644
--- a/include/grpc/impl/codegen/grpc_types.h
+++ b/include/grpc/impl/codegen/grpc_types.h
@@ -262,6 +262,7 @@ typedef enum grpc_call_error {
 } grpc_call_error;
 
 /* Default send/receive message size limits in bytes. -1 for unlimited. */
+/* TODO(roth) Make this match the default receive limit after next release */
 #define GRPC_DEFAULT_MAX_SEND_MESSAGE_LENGTH -1
 #define GRPC_DEFAULT_MAX_RECV_MESSAGE_LENGTH (4 * 1024 * 1024)