diff --git a/guides/source/generators.textile b/guides/source/generators.textile
index e9d713d91d..2e9ab0526d 100644
--- a/guides/source/generators.textile
+++ b/guides/source/generators.textile
@@ -468,7 +468,7 @@ Replaces text inside a file.
 
 <ruby>
 gsub_file 'name_of_file.rb', 'method.to_be_replaced', 'method.the_replacing_code'
-</ruby
+</ruby>
 
 Regular Expressions can be used to make this method more precise. You can also use append_file and prepend_file in the same way to place code at the beginning and end of a file respectively.