diff --git a/scripts/make_command-t.sh b/scripts/make_command-t.sh
index b7ea684..0b7fd10 100755
--- a/scripts/make_command-t.sh
+++ b/scripts/make_command-t.sh
@@ -1 +1,3 @@
+#!/bin/sh
+
 cd ~/.vim/bundle.available/command-t/ruby/command-t && /usr/bin/ruby extconf.rb && make