diff --git a/packages/SystemUI/aconfig/systemui.aconfig b/packages/SystemUI/aconfig/systemui.aconfig
index 5fbffbe..72ff800 100644
--- a/packages/SystemUI/aconfig/systemui.aconfig
+++ b/packages/SystemUI/aconfig/systemui.aconfig
@@ -82,6 +82,13 @@
 }
 
 flag {
+    name: "notification_avalanche_suppression"
+    namespace: "systemui"
+    description: "After notification avalanche floodgate event, suppress HUNs completely."
+    bug: "321089634"
+}
+
+flag {
     name: "notification_background_tint_optimization"
     namespace: "systemui"
     description: "Re-enable the codepath that removed tinting of notifications when the"