diff --git a/core/java/android/provider/Settings.java b/core/java/android/provider/Settings.java
index 5a6738c764eaf..a1fa030b02963 100755
--- a/core/java/android/provider/Settings.java
+++ b/core/java/android/provider/Settings.java
@@ -3562,6 +3562,7 @@ public final class Settings {
             DTMF_TONE_TYPE_WHEN_DIALING,
             HEARING_AID,
             TTY_MODE,
+            MASTER_MONO,
             SOUND_EFFECTS_ENABLED,
             HAPTIC_FEEDBACK_ENABLED,
             POWER_SOUNDS_ENABLED,       // moved to global