diff --git a/tmux.1 b/tmux.1
index be79e273..7b538ddb 100644
--- a/tmux.1
+++ b/tmux.1
@@ -1,4 +1,4 @@
-.\" $Id$
+.\" $OpenBSD$
 .\"
 .\" Copyright (c) 2007 Nicholas Marriott <nicm@users.sourceforge.net>
 .\"