1 files changed, 1 insertions, 0 deletions

diff --git a/mx.c b/mx.c
index 0d15cb2e..122bb675 100644
--- a/mx.c
+++ b/mx.c
@@ -1,3 +1,4 @@
+static char rcsid[]="$Id$";
 /*
  * Copyright (C) 1996-8 Michael R. Elkins <me@cs.hmc.edu>
  *