diff --git a/app/models/category.rb b/app/models/category.rb
index 89e9fd77430..c7740a7997a 100644
--- a/app/models/category.rb
+++ b/app/models/category.rb
@@ -194,7 +194,7 @@ SQL
 
   def topic_url
     if has_attribute?("topic_slug")
-      Topic.relative_url(topic_id, topic_slug)
+      Topic.relative_url(topic_id, read_attribute(:topic_slug))
     else
       topic_only_relative_url.try(:relative_url)
     end