diff --git a/lessons/ruby_object_model/lookup_chain_exercise/chair.rb b/lessons/ruby_object_model/lookup_chain_exercise/chair.rb
index 5bb936f0..f9dbcea7 100644
--- a/lessons/ruby_object_model/lookup_chain_exercise/chair.rb
+++ b/lessons/ruby_object_model/lookup_chain_exercise/chair.rb
@@ -2,7 +2,6 @@
 require "./furniture"
 
 class Chair < Furniture
-include FurnitureModule
   include ChairModule
 
   def initialize