diff --git a/lib/com_err/lex.l b/lib/com_err/lex.l
index 84356405d..b68814b21 100644
--- a/lib/com_err/lex.l
+++ b/lib/com_err/lex.l
@@ -44,8 +44,6 @@
 #include "parse.h"
 #include "lex.h"
 
-RCSID("$Id$");
-
 static unsigned lineno = 1;
 static int getstring(void);