diff --git a/app/views/layouts/header/_default.html.haml b/app/views/layouts/header/_default.html.haml
index a938a0c70b..ec1bdf6909 100644
--- a/app/views/layouts/header/_default.html.haml
+++ b/app/views/layouts/header/_default.html.haml
@@ -39,4 +39,4 @@
 = render 'shared/outdated_browser'
 -if defined?(@project)
   :javascript
-    var findFileURL = '#{namespace_project_find_file_path(@project.namespace, @project, @ref)}';
\ No newline at end of file
+    var findFileURL = '#{namespace_project_find_file_path(@project.namespace, @project, @ref || @project.repository.root_ref)}';
\ No newline at end of file