diff --git a/lib/pleroma/web/twitter_api/views/activity_view.ex b/lib/pleroma/web/twitter_api/views/activity_view.ex
index 661022afa..02ca4ee42 100644
--- a/lib/pleroma/web/twitter_api/views/activity_view.ex
+++ b/lib/pleroma/web/twitter_api/views/activity_view.ex
@@ -10,6 +10,7 @@ defmodule Pleroma.Web.TwitterAPI.ActivityView do
   alias Pleroma.Object
   alias Pleroma.Repo
   alias Pleroma.User
+  alias Pleroma.Web.CommonAPI
   alias Pleroma.Web.CommonAPI.Utils
   alias Pleroma.Web.MastodonAPI.StatusView
   alias Pleroma.Web.TwitterAPI.ActivityView
@@ -309,7 +310,8 @@ def render(
       "visibility" => StatusView.get_visibility(object),
       "summary" => summary,
       "summary_html" => summary |> Formatter.emojify(object["emoji"]),
-      "card" => card
+      "card" => card,
+      "muted" => CommonAPI.thread_muted?(user, activity) || User.mutes?(opts[:for], user)
     }
   end
 
diff --git a/test/web/twitter_api/views/activity_view_test.exs b/test/web/twitter_api/views/activity_view_test.exs
index 4f854ecaa..0a5384f34 100644
--- a/test/web/twitter_api/views/activity_view_test.exs
+++ b/test/web/twitter_api/views/activity_view_test.exs
@@ -56,6 +56,22 @@ test "tries to get a user by nickname if fetching by ap_id doesn't work" do
     assert result["user"]["id"] == user.id
   end
 
+  test "tells if the message is muted for some reason" do
+    user = insert(:user)
+    other_user = insert(:user)
+
+    {:ok, user} = User.mute(user, other_user)
+
+    {:ok, activity} = CommonAPI.post(other_user, %{"status" => "test"})
+    status = ActivityView.render("activity.json", %{activity: activity})
+
+    assert status["muted"] == false
+
+    status = ActivityView.render("activity.json", %{activity: activity, for: user})
+
+    assert status["muted"] == true
+  end
+
   test "a create activity with a html status" do
     text = """
     #Bike log - Commute Tuesday\nhttps://pla.bike/posts/20181211/\n#cycling #CHScycling #commute\nMVIMG_20181211_054020.jpg
@@ -149,7 +165,8 @@ test "a create activity with a note" do
       "uri" => activity.data["object"]["id"],
       "user" => UserView.render("show.json", %{user: user}),
       "visibility" => "direct",
-      "card" => nil
+      "card" => nil,
+      "muted" => false
     }
 
     assert result == expected