diff --git a/app/helpers/boxes_helper.rb b/app/helpers/boxes_helper.rb
index 2737565..6369535 100644
--- a/app/helpers/boxes_helper.rb
+++ b/app/helpers/boxes_helper.rb
@@ -99,7 +99,7 @@ module BoxesHelper
     unless block.visible?
       options[:title] = _("This block is invisible. Your visitors will not see it.")
     end
-    if @controller.send(:content_editor?)
+    if controller.send(:content_editor?)
       result = filter_html(result, block)
     end
     box_decorator.block_target(block.box, block) +
--
libgit2 0.21.2