diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 939bd3569..ebcb1bc1d 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -917,7 +917,7 @@ module ApplicationHelper
   def javascript_heads
     tags = javascript_include_tag(:defaults)
     unless User.current.pref.warn_on_leaving_unsaved == '0'
-      tags << "\n" + javascript_tag("Event.observe(window, 'load', function(){ new WarnLeavingUnsaved('#{escape_javascript( l(:text_warn_on_leaving_unsaved) )}'); });")
+      tags << "\n".html_safe + javascript_tag("Event.observe(window, 'load', function(){ new WarnLeavingUnsaved('#{escape_javascript( l(:text_warn_on_leaving_unsaved) )}'); });")
     end
     tags
   end