diff --git a/activerecord/lib/active_record/model.rb b/activerecord/lib/active_record/model.rb
index a326dabcd3..57553c29eb 100644
--- a/activerecord/lib/active_record/model.rb
+++ b/activerecord/lib/active_record/model.rb
@@ -141,7 +141,7 @@ module ActiveRecord
           "ActiveSupport::Concern + include, which will ensure that your class methods are " \
           "inherited."
         )
-        @base.extend *mods
+        @base.extend(*mods)
       end
     end
   end