diff --git a/phh-prop-handler.sh b/phh-prop-handler.sh
index 9dc9a2a..722b569 100644
--- a/phh-prop-handler.sh
+++ b/phh-prop-handler.sh
@@ -120,6 +120,7 @@ if [ "$1" == "persist.sys.phh.caf.audio_policy" ];then
     fi
 
     if [[ "$prop_value" == 1 ]];then
+        umount /vendor/etc/audio
         umount /vendor/etc/audio
         mount /vendor/etc/audio/audio_policy_configuration.xml /vendor/etc/audio_policy_configuration.xml
     else