diff --git a/lib/simple_form.rb b/lib/simple_form.rb
index fe494727..2a7512d7 100644
--- a/lib/simple_form.rb
+++ b/lib/simple_form.rb
@@ -102,7 +102,7 @@ module SimpleForm
   # type as key and the wrapper that will be used for all inputs with specified type.
   # e.g { :string => :string_wrapper, :boolean => :boolean_wrapper }
   # You can also set a wrapper mapping per form basis.
-  # e.g simple_form_for(@foo, :wrapper_mapping => { :checkbox => :bootstrap_checkbox })
+  # e.g simple_form_for(@foo, :wrapper_mappings => { :check_boxes => :bootstrap_checkbox })
   mattr_accessor :wrapper_mappings
   @@wrapper_mappings = nil