diff --git a/tcp.prs b/tcp.prs
index 952c4f3..d41eaed 100644
--- a/tcp.prs
+++ b/tcp.prs
@@ -9,7 +9,7 @@ TcpInbound = <inbound @host string @port int>.
 
 ActiveSocket =
   / <controller @controller #!Sink>
-  / <close @reason any>
+  / <close @message string>
   / Socket
 .