diff --git a/res/values/strings.xml b/res/values/strings.xml
index 22ae939225b..1b5f12571da 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -7421,7 +7421,7 @@
     <!-- Do not disturb settings, messages, events and reminders title [CHAR LIMIT=100]-->
     <string name="zen_msg_event_reminder_title">Messages, events &amp; reminders</string>
     <!-- Do not disturb settings, messages, events and reminders footer [CHAR LIMIT=NONE]-->
-    <string name="zen_msg_event_reminder_footer">When Do Not Disturb is on, messages, reminders, and events will muted, except for the items you allow above. You can adjust messages settings to allow your friends, family, or other contacts to reach you.</string>
+    <string name="zen_msg_event_reminder_footer">When Do Not Disturb is on, messages, reminders, and events will be muted, except for the items you allow above. You can adjust messages settings to allow your friends, family, or other contacts to reach you.</string>
 
     <!-- Do not disturb onboarding dialog, accept new settings [CHAR LIMIT=30]-->
     <string name="zen_onboarding_ok">Done</string>
diff --git a/src/com/android/settings/sound/AudioSwitchPreferenceController.java b/src/com/android/settings/sound/AudioSwitchPreferenceController.java
index 67236608df8..11caf45fc77 100644
--- a/src/com/android/settings/sound/AudioSwitchPreferenceController.java
+++ b/src/com/android/settings/sound/AudioSwitchPreferenceController.java
@@ -170,12 +170,20 @@ public abstract class AudioSwitchPreferenceController extends BasePreferenceCont
 
     @Override
     public void onStart() {
+        if (mLocalBluetoothManager == null) {
+            Log.e(TAG, "Bluetooth is not supported on this device");
+            return;
+        }
         mLocalBluetoothManager.setForegroundActivity(mContext);
         register();
     }
 
     @Override
     public void onStop() {
+        if (mLocalBluetoothManager == null) {
+            Log.e(TAG, "Bluetooth is not supported on this device");
+            return;
+        }
         mLocalBluetoothManager.setForegroundActivity(null);
         unregister();
     }
diff --git a/tests/robotests/src/com/android/settings/sound/AudioOutputSwitchPreferenceControllerTest.java b/tests/robotests/src/com/android/settings/sound/AudioOutputSwitchPreferenceControllerTest.java
index 1140aee98fb..bd11a159ba0 100644
--- a/tests/robotests/src/com/android/settings/sound/AudioOutputSwitchPreferenceControllerTest.java
+++ b/tests/robotests/src/com/android/settings/sound/AudioOutputSwitchPreferenceControllerTest.java
@@ -186,6 +186,8 @@ public class AudioOutputSwitchPreferenceControllerTest {
 
         AudioSwitchPreferenceController controller = new AudioSwitchPreferenceControllerTestable(
                 mContext, TEST_KEY);
+        controller.onStart();
+        controller.onStop();
 
         assertThat(mLocalBluetoothManager).isNull();
     }