diff --git a/chrome/browser/about_flags.cc b/chrome/browser/about_flags.cc
index 7f3a6ba..c090c6af 100644
--- a/chrome/browser/about_flags.cc
+++ b/chrome/browser/about_flags.cc
@@ -1666,6 +1666,8 @@
     kQuietNotificationPromptsWithAdaptiveActivation[] = {
         {QuietNotificationPermissionUiConfig::kEnableAdaptiveActivation,
          "true"},
+        {QuietNotificationPermissionUiConfig::kEnableAbusiveRequestBlocking,
+         "true"},
         {QuietNotificationPermissionUiConfig::kEnableCrowdDenyTriggering,
          "true"},
         {QuietNotificationPermissionUiConfig::kCrowdDenyHoldBackChance, "0"}};