diff --git a/lib/delegate.rb b/lib/delegate.rb
index c540c2ec77..d6fb90bdbf 100644
--- a/lib/delegate.rb
+++ b/lib/delegate.rb
@@ -21,6 +21,8 @@
 # SimpleDelegator's implementation serves as a nice example of the use of
 # Delegator:
 #
+#   require 'delegate'
+#
 #   class SimpleDelegator < Delegator
 #     def __getobj__
 #       @delegate_sd_obj # return object we are delegating to, required
@@ -253,6 +255,8 @@ end
 #     end
 #   end
 #
+#   require 'delegate'
+#
 #   class UserDecorator < SimpleDelegator
 #     def birth_year
 #       born_on.year