diff --git a/app/models/topic.rb b/app/models/topic.rb
index deda3d2256d..f0933b0d4c4 100644
--- a/app/models/topic.rb
+++ b/app/models/topic.rb
@@ -540,6 +540,7 @@ class Topic < ActiveRecord::Base
 
   def change_category_to_id(category_id)
     return false if private_message?
+    return false if category.try(:is_support)
 
     new_category_id = category_id.to_i
     # if the category name is blank, reset the attribute
diff --git a/spec/controllers/topics_controller_spec.rb b/spec/controllers/topics_controller_spec.rb
index feaf5603c63..09cd717b93e 100644
--- a/spec/controllers/topics_controller_spec.rb
+++ b/spec/controllers/topics_controller_spec.rb
@@ -898,6 +898,18 @@ describe TopicsController do
           end
         end
 
+        context 'when topic is in support category' do
+          let(:another_category) { Fabricate(:category) }
+
+          it "cannot change the category of a topic that is in a support category" do
+            @topic.category = Fabricate(:category, is_support: true)
+            @topic.save!
+            xhr :put, :update, topic_id: @topic.id, slug: @topic.title, category_id: another_category.id
+            expect(response).not_to be_success
+          end
+
+        end
+
         context "allow_uncategorized_topics is false" do
           before do
             SiteSetting.stubs(:allow_uncategorized_topics).returns(false)