diff --git a/guides/source/plugins.md b/guides/source/plugins.md
index 10738320ef..4e630a39f3 100644
--- a/guides/source/plugins.md
+++ b/guides/source/plugins.md
@@ -265,7 +265,7 @@ module Yaffle
   end
 end
 
-ActiveRecord::Base.send :include, Yaffle::ActsAsYaffle
+ActiveRecord::Base.include(Yaffle::ActsAsYaffle)
 ```
 
 You can then return to the root directory (`cd ../..`) of your plugin and rerun the tests using `rake`.
@@ -308,7 +308,7 @@ module Yaffle
   end
 end
 
-ActiveRecord::Base.send :include, Yaffle::ActsAsYaffle
+ActiveRecord::Base.include(Yaffle::ActsAsYaffle)
 ```
 
 When you run `rake`, you should see the tests all pass:
@@ -382,7 +382,7 @@ module Yaffle
   end
 end
 
-ActiveRecord::Base.send :include, Yaffle::ActsAsYaffle
+ActiveRecord::Base.include(Yaffle::ActsAsYaffle)
 ```
 
 Run `rake` one final time and you should see: