diff --git a/spec/dummy/app/decorators/mongoid_post_decorator.rb b/spec/dummy/app/decorators/mongoid_post_decorator.rb
index 61596e4..42d87e0 100644
--- a/spec/dummy/app/decorators/mongoid_post_decorator.rb
+++ b/spec/dummy/app/decorators/mongoid_post_decorator.rb
@@ -1,2 +1,4 @@
-class MongoidPostDecorator < Draper::Decorator
+if defined?(Mongoid)
+  class MongoidPostDecorator < Draper::Decorator
+  end
 end