diff --git a/app/javascript/mastodon/reducers/notifications.js b/app/javascript/mastodon/reducers/notifications.js
index 4a7a822a35..2ca301b19a 100644
--- a/app/javascript/mastodon/reducers/notifications.js
+++ b/app/javascript/mastodon/reducers/notifications.js
@@ -281,7 +281,7 @@ export default function notifications(state = initialState, action) {
   case blockAccountSuccess.type:
     return filterNotifications(state, [action.payload.relationship.id]);
   case muteAccountSuccess.type:
-    return action.relationship.muting_notifications ? filterNotifications(state, [action.payload.relationship.id]) : state;
+    return action.payload.relationship.muting_notifications ? filterNotifications(state, [action.payload.relationship.id]) : state;
   case blockDomainSuccess.type:
     return filterNotifications(state, action.payload.accounts);
   case authorizeFollowRequestSuccess.type: