diff --git a/prog/pwm/vt1211_pwm b/prog/pwm/vt1211_pwm
index 67dd6a8b..9d76f340 100755
--- a/prog/pwm/vt1211_pwm
+++ b/prog/pwm/vt1211_pwm
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 #
 # vt1211_pwm - Manually control the PWM outputs of the VIA vt1211 Super-I/O
 #