diff --git a/overlay/frameworks/base/core/res/res/values/config.xml b/overlay/frameworks/base/core/res/res/values/config.xml
index 2afdee8..fac7327 100644
--- a/overlay/frameworks/base/core/res/res/values/config.xml
+++ b/overlay/frameworks/base/core/res/res/values/config.xml
@@ -247,6 +247,9 @@
     <!-- Default color for notification LED is white. -->
     <color name="config_defaultNotificationColor">#ff0000ff</color>
 
+    <!-- reference volume index for music stream to limit headphone volume and display warning -->
+    <integer name="config_safe_media_volume_index">8</integer>
+
     <!-- If this is true, the screen will come on when you unplug usb/power/whatever. -->
     <bool name="config_unplugTurnsOnScreen">true</bool>