diff --git a/lib/open_project/backlogs/engine.rb b/lib/open_project/backlogs/engine.rb
index ec28cd0de4..cf12d22794 100644
--- a/lib/open_project/backlogs/engine.rb
+++ b/lib/open_project/backlogs/engine.rb
@@ -108,7 +108,7 @@ module OpenProject::Backlogs
            caption: :project_module_backlogs,
            before: :calendar,
            param: :project_id,
-           if: proc { notUser.current.respond_to?(:impaired?) and User.current.impaired? },
+           if: proc { not(User.current.respond_to?(:impaired?) and User.current.impaired?) },
            html: { class: 'icon2 icon-backlogs-icon' }
     end