diff --git a/app/assets/javascripts/discourse/app/lib/transform-post.js b/app/assets/javascripts/discourse/app/lib/transform-post.js
index 8d5d4973da8..ff5516da228 100644
--- a/app/assets/javascripts/discourse/app/lib/transform-post.js
+++ b/app/assets/javascripts/discourse/app/lib/transform-post.js
@@ -84,6 +84,7 @@ export function transformBasicPost(post) {
     readCount: post.readers_count,
     canPublishPage: false,
     trustLevel: post.trust_level,
+    userSuspended: post.user_suspended,
   };
 
   _additionalAttributes.forEach((a) => (postAtts[a] = post[a]));
diff --git a/app/assets/javascripts/discourse/app/widgets/post.js b/app/assets/javascripts/discourse/app/widgets/post.js
index fe345ab0b6b..0c27567a785 100644
--- a/app/assets/javascripts/discourse/app/widgets/post.js
+++ b/app/assets/javascripts/discourse/app/widgets/post.js
@@ -849,6 +849,9 @@ export default createWidget("post", {
     } else {
       classNames.push("regular");
     }
+    if (attrs.userSuspended) {
+      classNames.push("user-suspended");
+    }
     if (addPostClassesCallbacks) {
       for (let i = 0; i < addPostClassesCallbacks.length; i++) {
         let pluginClasses = addPostClassesCallbacks[i].call(this, attrs);
diff --git a/app/assets/javascripts/discourse/tests/acceptance/topic-test.js b/app/assets/javascripts/discourse/tests/acceptance/topic-test.js
index 80970d7a596..bbbbeaf5fa9 100644
--- a/app/assets/javascripts/discourse/tests/acceptance/topic-test.js
+++ b/app/assets/javascripts/discourse/tests/acceptance/topic-test.js
@@ -246,6 +246,15 @@ acceptance("Topic", function (needs) {
     assert.ok(exists(".category-moderator"), "it has a class applied");
     assert.ok(exists(".d-icon-shield-alt"), "it shows an icon");
   });
+
+  test("Suspended user posts", async function (assert) {
+    await visit("/t/topic-from-suspended-user/54077");
+
+    assert.ok(
+      exists(".topic-post.user-suspended > #post_1"),
+      "it has a class applied"
+    );
+  });
 });
 
 acceptance("Topic featured links", function (needs) {
diff --git a/app/assets/javascripts/discourse/tests/fixtures/topic.js b/app/assets/javascripts/discourse/tests/fixtures/topic.js
index 8fbd7aad064..909483a1b15 100644
--- a/app/assets/javascripts/discourse/tests/fixtures/topic.js
+++ b/app/assets/javascripts/discourse/tests/fixtures/topic.js
@@ -6251,6 +6251,7 @@ export default {
           edit_reason: null,
           can_view_edit_history: true,
           wiki: false,
+          user_suspended: true,
         },
         {
           id: 419,
diff --git a/app/serializers/post_serializer.rb b/app/serializers/post_serializer.rb
index f324012d4a8..c03537c7c74 100644
--- a/app/serializers/post_serializer.rb
+++ b/app/serializers/post_serializer.rb
@@ -86,7 +86,8 @@ class PostSerializer < BasicPostSerializer
              :excerpt,
              :reviewable_id,
              :reviewable_score_count,
-             :reviewable_score_pending_count
+             :reviewable_score_pending_count,
+             :user_suspended
 
   def initialize(object, opts)
     super(object, opts)
@@ -549,6 +550,14 @@ class PostSerializer < BasicPostSerializer
     can_review_topic?
   end
 
+  def user_suspended
+    true
+  end
+
+  def include_user_suspended?
+    object.user&.suspended?
+  end
+
 private
 
   def can_review_topic?
diff --git a/spec/serializers/post_serializer_spec.rb b/spec/serializers/post_serializer_spec.rb
index b908280d6e4..57db8590f32 100644
--- a/spec/serializers/post_serializer_spec.rb
+++ b/spec/serializers/post_serializer_spec.rb
@@ -88,6 +88,26 @@ describe PostSerializer do
     end
   end
 
+  context "a post by a suspended user" do
+    def subject
+      PostSerializer.new(post, scope: Guardian.new(Fabricate(:admin)), root: false).as_json
+    end
+
+    it "serializes correctly" do
+      expect(subject[:user_suspended]).to be_nil
+
+      post.user.update!(
+        suspended_till: 1.month.from_now,
+      )
+
+      expect(subject[:user_suspended]).to eq(true)
+
+      freeze_time (2.months.from_now)
+
+      expect(subject[:user_suspended]).to be_nil
+    end
+  end
+
   context "display_username" do
     let(:user) { post.user }
     let(:serializer) { PostSerializer.new(post, scope: Guardian.new, root: false) }