diff --git a/git-instaweb.sh b/git-instaweb.sh
index 4c0af04fe..47e38f34c 100755
--- a/git-instaweb.sh
+++ b/git-instaweb.sh
@@ -205,7 +205,7 @@ webrick_conf () {
 	# actual gitweb.cgi using a shell script to force it
   wrapper="$fqgitdir/gitweb/$httpd/wrapper.sh"
 	cat > "$wrapper" <<EOF
-#!/bin/sh
+#!@SHELL_PATH@
 # we use this shell script wrapper around the real gitweb.cgi since
 # there appears to be no other way to pass arbitrary environment variables
 # into the CGI process