diff --git a/lib/grouped_scope/arish/associations/builder/grouped_association.rb b/lib/grouped_scope/arish/associations/builder/grouped_association.rb
index f8be83f..de00efb 100644
--- a/lib/grouped_scope/arish/associations/builder/grouped_association.rb
+++ b/lib/grouped_scope/arish/associations/builder/grouped_association.rb
@@ -22,14 +22,14 @@ def build
             model.send(ungrouped_reflection.macro, grouped_name, grouped_options).tap do |grouped_reflection|
               grouped_reflection.grouped_scope = true
               model.grouped_reflections = model.grouped_reflections.merge(ungrouped_name => grouped_reflection)
-              define_grouped_scope_reader(model)
+              define_grouped_scope_reader
             end
           end
           
           
           private
           
-          def define_grouped_scope_reader(model)
+          def define_grouped_scope_reader
             model.send(:define_method, :group) do
               @group ||= GroupedScope::SelfGroupping.new(self)
             end