diff --git a/src/github.com/matrix-org/dendrite/cmd/client-api-proxy/main.go b/src/github.com/matrix-org/dendrite/cmd/client-api-proxy/main.go
index 83663c527..b725e6cf2 100644
--- a/src/github.com/matrix-org/dendrite/cmd/client-api-proxy/main.go
+++ b/src/github.com/matrix-org/dendrite/cmd/client-api-proxy/main.go
@@ -26,6 +26,8 @@ This tool will proxy requests for all client-server URLs and forward
 them to their respective process. It will also add the '/api' path
 prefix to incoming requests.
 
+THIS TOOL IS FOR TESTING AND NOT INTENDED FOR PRODUCTION USE.
+
 Arguments:
 
 `