diff --git a/relay.go b/relay.go
index cff2341..2ef239f 100644
--- a/relay.go
+++ b/relay.go
@@ -217,7 +217,7 @@ func (r *Relay) ConnectWithTLS(ctx context.Context, tlsConfig *tls.Config) error
 			}
 
 			message := buf.Bytes()
-			debugLogf("{%s} %v\n", r.URL, message)
+			debugLogf("{%s} received %v\n", r.URL, message)
 			envelope := ParseMessage(message)
 			if envelope == nil {
 				if r.customHandler != nil {