diff --git a/app/serializers/topic_view_details_serializer.rb b/app/serializers/topic_view_details_serializer.rb
index 16a28e40f59..2576bf7406e 100644
--- a/app/serializers/topic_view_details_serializer.rb
+++ b/app/serializers/topic_view_details_serializer.rb
@@ -163,7 +163,9 @@ class TopicViewDetailsSerializer < ApplicationSerializer
   end
 
   def allowed_users
-    object.topic.allowed_users.reject { |user| object.group_allowed_user_ids.include?(user.id) }
+    object.topic.allowed_users.reject do |user|
+      object.group_allowed_user_ids.include?(user.id) && user != scope.user
+    end
   end
 
   def include_allowed_users?
diff --git a/spec/serializers/topic_view_details_serializer_spec.rb b/spec/serializers/topic_view_details_serializer_spec.rb
new file mode 100644
index 00000000000..0705ee4e84e
--- /dev/null
+++ b/spec/serializers/topic_view_details_serializer_spec.rb
@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe TopicViewDetailsSerializer do
+  describe '#allowed_users' do
+    it "add the current user to the allowed user's list even if they are an allowed group member" do
+      participant = Fabricate(:user)
+      another_participant = Fabricate(:user)
+
+      participant_group = Fabricate(:group)
+      participant_group.add(participant)
+      participant_group.add(another_participant)
+
+      pm = Fabricate(:private_message_topic,
+        topic_allowed_users: [
+          Fabricate.build(:topic_allowed_user, user: participant),
+          Fabricate.build(:topic_allowed_user, user: another_participant)
+        ],
+        topic_allowed_groups: [Fabricate.build(:topic_allowed_group, group: participant_group)]
+      )
+
+      serializer = described_class.new(TopicView.new(pm, participant), scope: Guardian.new(participant))
+      allowed_users = serializer.as_json.dig(:topic_view_details, :allowed_users).map { |u| u[:id] }
+
+      expect(allowed_users).to contain_exactly(participant.id)
+    end
+  end
+end