diff --git a/rro_overlay/FrameworksOverlay/res/values/config.xml b/rro_overlay/FrameworksOverlay/res/values/config.xml
index 710d70b5..f08df758 100644
--- a/rro_overlay/FrameworksOverlay/res/values/config.xml
+++ b/rro_overlay/FrameworksOverlay/res/values/config.xml
@@ -978,4 +978,7 @@
     <!-- The number of volume steps for the ring stream -->
     <integer name="config_audio_ring_vol_steps">25</integer>
 
+    <!-- Flag indicating whether notification and ringtone volumes
+         are controlled together (aliasing is true) or not. -->
+    <bool name="config_alias_ring_notif_stream_types">false</bool>
 </resources>