diff --git a/packages/CarSystemUI/src/com/android/systemui/statusbar/car/CarStatusBar.java b/packages/CarSystemUI/src/com/android/systemui/statusbar/car/CarStatusBar.java
index 146bfe02498b6..2c53378e41fb9 100644
--- a/packages/CarSystemUI/src/com/android/systemui/statusbar/car/CarStatusBar.java
+++ b/packages/CarSystemUI/src/com/android/systemui/statusbar/car/CarStatusBar.java
@@ -1072,9 +1072,10 @@ public class CarStatusBar extends StatusBar implements
             // shade is visible to the user. When the notification shade is completely open then
             // alpha value will be 1.
             float alpha = (float) height / mNotificationView.getHeight();
-            Drawable background = mNotificationView.getBackground();
+            Drawable background = mNotificationView.getBackground().mutate();
 
             background.setAlpha((int) (alpha * 255));
+            mNotificationView.setBackground(background);
         }
     }