diff --git a/app/helpers/spree/admin/navigation_helper.rb b/app/helpers/spree/admin/navigation_helper.rb
index 3a5495488a..a1ca50e868 100644
--- a/app/helpers/spree/admin/navigation_helper.rb
+++ b/app/helpers/spree/admin/navigation_helper.rb
@@ -34,7 +34,7 @@ module Spree
         end
 
         selected = if options[:match_path]
-                     request.fullpath.starts_with?("#{spree.root_path}admin#{options[:match_path]}")
+                     request.fullpath.starts_with?("#{main_app.root_path}admin#{options[:match_path]}")
                    else
                      args.include?(controller.controller_name.to_sym)
                    end