diff --git a/lib/formtastic/inputs/boolean_input.rb b/lib/formtastic/inputs/boolean_input.rb
index 91f3e2cd9..4cc0cad54 100644
--- a/lib/formtastic/inputs/boolean_input.rb
+++ b/lib/formtastic/inputs/boolean_input.rb
@@ -97,11 +97,7 @@ def input_html_options_name
       end
 
       def checked?
-        if defined? ActionView::Helpers::InstanceTag
-          object && ActionView::Helpers::InstanceTag.check_box_checked?(object.send(method), checked_value)
-        else
-          object && boolean_checked?(object.send(method), checked_value) 
-        end
+        object && boolean_checked?(object.send(method), checked_value) 
       end
       
       private