diff --git a/gitk b/gitk
index bd10f7dcf..aa083dc47 100755
--- a/gitk
+++ b/gitk
@@ -1,6 +1,6 @@
 #!/bin/sh
 # Tcl ignores the next line -*- tcl -*- \
-exec wish8.4 "$0" -- "${1+$@}"
+exec wish "$0" -- "${1+$@}"
 
 # Copyright (C) 2005 Paul Mackerras.  All rights reserved.
 # This program is free software; it may be used, copied, modified