diff --git a/media/java/android/media/AudioAttributes.java b/media/java/android/media/AudioAttributes.java
index dc3041f..820d82d 100644
--- a/media/java/android/media/AudioAttributes.java
+++ b/media/java/android/media/AudioAttributes.java
@@ -222,10 +222,10 @@
     public final static int SUPPRESSIBLE_MEDIA = 5;
     /**
      * @hide
-     * Denotes a usage for all other sounds not caught in SUPPRESSIBLE_NOTIFICATION,
+     * Denotes a usage for sounds not caught in SUPPRESSIBLE_NOTIFICATION,
      * SUPPRESSIBLE_CALL,SUPPRESSIBLE_NEVER, SUPPRESSIBLE_ALARM or SUPPRESSIBLE_MEDIA.
-     * This includes system, sonification and unknown sounds.
-     * These will be muted when the Zen priority mode doesn't allow sytem sounds
+     * This includes sonification sounds.
+     * These will be muted when the Zen priority mode doesn't allow system sounds
      * @see #SUPPRESSIBLE_USAGES
      */
     public final static int SUPPRESSIBLE_SYSTEM = 6;
@@ -248,6 +248,7 @@
         SUPPRESSIBLE_USAGES.put(USAGE_NOTIFICATION_EVENT,                SUPPRESSIBLE_NOTIFICATION);
         SUPPRESSIBLE_USAGES.put(USAGE_ASSISTANCE_ACCESSIBILITY,          SUPPRESSIBLE_NEVER);
         SUPPRESSIBLE_USAGES.put(USAGE_VOICE_COMMUNICATION,               SUPPRESSIBLE_NEVER);
+        SUPPRESSIBLE_USAGES.put(USAGE_VOICE_COMMUNICATION_SIGNALLING,    SUPPRESSIBLE_NEVER);
         SUPPRESSIBLE_USAGES.put(USAGE_ALARM,                             SUPPRESSIBLE_ALARM);
         SUPPRESSIBLE_USAGES.put(USAGE_MEDIA,                             SUPPRESSIBLE_MEDIA);
         SUPPRESSIBLE_USAGES.put(USAGE_ASSISTANCE_NAVIGATION_GUIDANCE,    SUPPRESSIBLE_MEDIA);
@@ -255,7 +256,6 @@
         SUPPRESSIBLE_USAGES.put(USAGE_ASSISTANT,                         SUPPRESSIBLE_MEDIA);
         /** default volume assignment is STREAM_MUSIC, handle unknown usage as media */
         SUPPRESSIBLE_USAGES.put(USAGE_UNKNOWN,                           SUPPRESSIBLE_MEDIA);
-        SUPPRESSIBLE_USAGES.put(USAGE_VOICE_COMMUNICATION_SIGNALLING,    SUPPRESSIBLE_SYSTEM);
         SUPPRESSIBLE_USAGES.put(USAGE_ASSISTANCE_SONIFICATION,           SUPPRESSIBLE_SYSTEM);
     }