diff --git a/plugins/disk/du_pattern b/plugins/disk/du_pattern
index 221cda77..55f82618 100755
--- a/plugins/disk/du_pattern
+++ b/plugins/disk/du_pattern
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # -*- sh -*-
 # vim: ft=sh