diff --git a/lib/cocoon/formtastic/cocoon_input.rb b/lib/cocoon/formtastic/cocoon_input.rb
index f07dd1d..9198f94 100644
--- a/lib/cocoon/formtastic/cocoon_input.rb
+++ b/lib/cocoon/formtastic/cocoon_input.rb
@@ -18,7 +18,7 @@ class CocoonInput
       template.link_to_add_association template.t('.add'), builder, method, input_html_options
     end
 
-    data = wraper_html_options.merge(:class => 'input cocoon')
+    data = wrapper_html_options.merge(:class => 'input cocoon')
     if options[:ordered_by]
       data['data-ordered_by'] = options[:ordered_by]
     end