diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationData.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationData.java
index 27c283749abcc..a51896ee69fc2 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationData.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/NotificationData.java
@@ -90,7 +90,7 @@ public class NotificationData {
         private static final long INITIALIZATION_DELAY = 400;
         private static final long NOT_LAUNCHED_YET = -LAUNCH_COOLDOWN;
         private static final int COLOR_INVALID = 1;
-        public String key;
+        public final String key;
         public StatusBarNotification notification;
         public NotificationChannel channel;
         public long lastAudiblyAlertedMs;