diff --git a/lib/pleroma/web/streamer/streamer.ex b/lib/pleroma/web/streamer/streamer.ex
index 49a400df7..0cf41189b 100644
--- a/lib/pleroma/web/streamer/streamer.ex
+++ b/lib/pleroma/web/streamer/streamer.ex
@@ -136,7 +136,7 @@ def filtered_by_user?(%User{} = user, %Activity{} = item) do
          false <- Pleroma.Web.ActivityPub.MRF.subdomain_match?(domain_blocks, item_host),
          false <- Pleroma.Web.ActivityPub.MRF.subdomain_match?(domain_blocks, parent_host),
          true <- thread_containment(item, user),
-         false <- CommonAPI.thread_muted?(user, item) do
+         false <- CommonAPI.thread_muted?(user, parent) do
       false
     else
       _ -> true
diff --git a/test/web/streamer/streamer_test.exs b/test/web/streamer/streamer_test.exs
index cb4595bb6..4cf640ce8 100644
--- a/test/web/streamer/streamer_test.exs
+++ b/test/web/streamer/streamer_test.exs
@@ -112,6 +112,25 @@ test "it streams boosts of the user in the 'user' stream", %{user: user} do
       refute Streamer.filtered_by_user?(user, announce)
     end
 
+    test "it streams boosts of mastodon user in the 'user' stream", %{user: user} do
+      Streamer.get_topic_and_add_socket("user", user)
+
+      other_user = insert(:user)
+      {:ok, activity} = CommonAPI.post(other_user, %{status: "hey"})
+
+      data =
+        File.read!("test/fixtures/mastodon-announce.json")
+        |> Poison.decode!()
+        |> Map.put("object", activity.data["object"])
+        |> Map.put("actor", user.ap_id)
+
+      {:ok, %Pleroma.Activity{data: data, local: false} = announce} =
+        Pleroma.Web.ActivityPub.Transmogrifier.handle_incoming(data)
+
+      assert_receive {:render_with_user, Pleroma.Web.StreamerView, "update.json", ^announce}
+      refute Streamer.filtered_by_user?(user, announce)
+    end
+
     test "it sends notify to in the 'user' stream", %{user: user, notify: notify} do
       Streamer.get_topic_and_add_socket("user", user)
       Streamer.stream("user", notify)