diff --git a/platform/mv3/safari/ext-compat.js b/platform/mv3/safari/ext-compat.js
index 50c8dd0e4..0d56155e2 100644
--- a/platform/mv3/safari/ext-compat.js
+++ b/platform/mv3/safari/ext-compat.js
@@ -53,7 +53,7 @@ const prepareUpdateRules = optionsBefore => {
     const { addRules, removeRuleIds } = optionsBefore;
     const addRulesAfter = addRules?.filter(isSupportedRule);
     if ( Boolean(addRulesAfter?.length || removeRuleIds?.length) === false ) { return; }
-    addRulesAfter.forEach(r => {
+    addRulesAfter?.forEach(r => {
         if ( r.action.redirect?.regexSubstitution === undefined ) { return; }
         if ( r.condition.requestDomains === undefined ) { return; }
         r.condition.domains = r.condition.requestDomains;