diff --git a/lib/completely/template.erb b/lib/completely/template.erb
index de2c095..565a09b 100644
--- a/lib/completely/template.erb
+++ b/lib/completely/template.erb
@@ -1,9 +1,12 @@
-#!/usr/bin/env bash
+# Bash completion script                           -*- shell-script -*-
 
 # This bash completions script was generated by
 # completely (https://github.com/dannyben/completely)
 # Modifying it manually is not recommended
+
 <%= function_name %>() {
+  _init_completion -s || return
+
   local cur=${COMP_WORDS[COMP_CWORD]}
   local comp_line="${COMP_WORDS[@]:1}"
 
@@ -13,6 +16,6 @@
     '<%= pattern.text_without_prefix %>'*) COMPREPLY=($(compgen <%= pattern.compgen %> -- "$cur")) ;;
 % end
   esac
-}
+} && complete -F <%= function_name %> -o bashdefault -o default <%= command %>
 
-complete -F <%= function_name %> <%= command %>
+# ex: filetype=sh