diff --git a/chrome/browser/prefs/browser_prefs.cc b/chrome/browser/prefs/browser_prefs.cc
index 1e7a865..5da1b6f 100644
--- a/chrome/browser/prefs/browser_prefs.cc
+++ b/chrome/browser/prefs/browser_prefs.cc
@@ -951,6 +951,10 @@
     "ash.night_light.cached_longitude";
 #endif
 
+// Deprecated 11/2023.
+const char kPrivacySandboxAntiAbuseInitialized[] =
+    "privacy_sandbox.anti_abuse_initialized";
+
 // Register local state used only for migration (clearing or moving to a new
 // key).
 void RegisterLocalStatePrefsForMigration(PrefRegistrySimple* registry) {
@@ -1342,6 +1346,9 @@
   registry->RegisterDoublePref(kNightLightCachedLatitude, 0.0);
   registry->RegisterDoublePref(kNightLightCachedLongitude, 0.0);
 #endif  // BUILDFLAG(IS_CHROMEOS_ASH)
+
+  // Deprecated 11/2023.
+  registry->RegisterBooleanPref(kPrivacySandboxAntiAbuseInitialized, false);
 }
 
 void ClearSyncRequestedPrefAndMaybeMigrate(PrefService* profile_prefs) {
@@ -2524,6 +2531,9 @@
   profile_prefs->ClearPref(kNightLightCachedLongitude);
 #endif  // BUILDFLAG(IS_CHROMEOS_ASH)
 
+  // Added 11/2023
+  profile_prefs->ClearPref(kPrivacySandboxAntiAbuseInitialized);
+
   // Please don't delete the following line. It is used by PRESUBMIT.py.
   // END_MIGRATE_OBSOLETE_PROFILE_PREFS