diff --git a/git-tag.sh b/git-tag.sh
index 16efc5b70a..e71028695c 100755
--- a/git-tag.sh
+++ b/git-tag.sh
@@ -1,7 +1,7 @@
#!/bin/sh
# Copyright (c) 2005 Linus Torvalds
-. git-sh-setup
+GIT_DIR=`git-rev-parse --git-dir` || exit $?
usage () {
echo >&2 "Usage: git-tag [-a | -s | -u <key-id>] [-f | -d] [-m <msg>] <tagname> [<head>]"