diff --git a/proto/src/system_messages.proto b/proto/src/system_messages.proto
index 196c6aa..e89dda9 100644
--- a/proto/src/system_messages.proto
+++ b/proto/src/system_messages.proto
@@ -362,5 +362,11 @@
     // Notify the user that some accessibility service has view and control permissions.
     // package: android
     NOTE_A11Y_VIEW_AND_CONTROL_ACCESS = 1005;
+
+    // Notify the user an abusive background app has been detected.
+    // Package: android
+    // Note: this is a base ID, multiple notifications will be posted for each
+    // abusive apps, with notification ID based off this ID.
+    NOTE_ABUSIVE_BG_APPS_BASE = 0xc1b2508; // 203105544
   }
 }