diff --git a/Makefile.am b/Makefile.am
index 696ccb2b..8b39ccfc 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,4 +1,4 @@
-# $Id$
+# Makefile.am
 
 # Obvious program stuff.
 bin_PROGRAMS = tmux
diff --git a/configure.ac b/configure.ac
index f3fabd94..7874e2a7 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,4 @@
-# $Id$
+# configure.ac
 
 # Miscellaneous bits.
 AC_INIT(tmux, 2.1)
diff --git a/tools/cmp-cvs.sh b/tools/cmp-cvs.sh
index 104ded6b..5429d769 100644
--- a/tools/cmp-cvs.sh
+++ b/tools/cmp-cvs.sh
@@ -1,4 +1,4 @@
-# $Id$
+#!/bin/ksh
 
 rm diff.out
 touch diff.out