diff --git a/packages/SettingsLib/src/com/android/settingslib/media/LocalMediaManager.java b/packages/SettingsLib/src/com/android/settingslib/media/LocalMediaManager.java
index 7458f010..cff6435 100644
--- a/packages/SettingsLib/src/com/android/settingslib/media/LocalMediaManager.java
+++ b/packages/SettingsLib/src/com/android/settingslib/media/LocalMediaManager.java
@@ -22,6 +22,7 @@
 import android.bluetooth.BluetoothDevice;
 import android.content.Context;
 import android.graphics.drawable.Drawable;
+import android.media.AudioDeviceAttributes;
 import android.media.AudioManager;
 import android.media.RoutingSessionInfo;
 import android.os.Build;
@@ -592,9 +593,11 @@
         }
 
         private boolean isMutingExpectedDevice(CachedBluetoothDevice cachedDevice) {
-            return mAudioManager.getMutingExpectedDevice() != null
-                    && cachedDevice.getAddress().equals(
-                    mAudioManager.getMutingExpectedDevice().getAddress());
+            AudioDeviceAttributes mutingExpectedDevice = mAudioManager.getMutingExpectedDevice();
+            if (mutingExpectedDevice == null || cachedDevice == null) {
+                return false;
+            }
+            return cachedDevice.getAddress().equals(mutingExpectedDevice.getAddress());
         }
 
         private List<MediaDevice> buildDisconnectedBluetoothDevice() {
diff --git a/packages/SystemUI/src/com/android/systemui/media/dialog/MediaOutputDialog.java b/packages/SystemUI/src/com/android/systemui/media/dialog/MediaOutputDialog.java
index fbd0079..cb6f5a7 100644
--- a/packages/SystemUI/src/com/android/systemui/media/dialog/MediaOutputDialog.java
+++ b/packages/SystemUI/src/com/android/systemui/media/dialog/MediaOutputDialog.java
@@ -108,7 +108,7 @@
 
     @Override
     public CharSequence getStopButtonText() {
-        int resId = R.string.keyboard_key_media_stop;
+        int resId = R.string.media_output_dialog_button_stop_casting;
         if (isBroadcastSupported() && mMediaOutputController.isPlaying()
                 && !mMediaOutputController.isBluetoothLeBroadcastEnabled()) {
             resId = R.string.media_output_broadcast;
diff --git a/packages/SystemUI/tests/src/com/android/systemui/media/dialog/MediaOutputDialogTest.java b/packages/SystemUI/tests/src/com/android/systemui/media/dialog/MediaOutputDialogTest.java
index 31866a8..b02fdf4 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/media/dialog/MediaOutputDialogTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/media/dialog/MediaOutputDialogTest.java
@@ -247,7 +247,8 @@
 
     @Test
     public void getStopButtonText_notSupportsBroadcast_returnsDefaultText() {
-        String stopText = mContext.getText(R.string.keyboard_key_media_stop).toString();
+        String stopText = mContext.getText(
+                R.string.media_output_dialog_button_stop_casting).toString();
         MediaOutputController mockMediaOutputController = mock(MediaOutputController.class);
         when(mockMediaOutputController.isBroadcastSupported()).thenReturn(false);