diff --git a/app/javascript/mastodon/reducers/notifications.js b/app/javascript/mastodon/reducers/notifications.js
index 19a02f5b1..c891f4a52 100644
--- a/app/javascript/mastodon/reducers/notifications.js
+++ b/app/javascript/mastodon/reducers/notifications.js
@@ -108,6 +108,7 @@ export default function notifications(state = initialState, action) {
   case NOTIFICATIONS_EXPAND_SUCCESS:
     return expandNormalizedNotifications(state, action.notifications, action.next);
   case ACCOUNT_BLOCK_SUCCESS:
+    return filterNotifications(state, action.relationship);
   case ACCOUNT_MUTE_SUCCESS:
     return action.relationship.muting_notifications ? filterNotifications(state, action.relationship) : state;
   case NOTIFICATIONS_CLEAR: