diff --git a/lib/redmine/wiki_formatting/textile/helper.rb b/lib/redmine/wiki_formatting/textile/helper.rb
index dbf0cb713..9d356c675 100644
--- a/lib/redmine/wiki_formatting/textile/helper.rb
+++ b/lib/redmine/wiki_formatting/textile/helper.rb
@@ -26,7 +26,7 @@ module Redmine
           help_link = link_to(l(:setting_text_formatting), url,
             :onclick => "window.open(\"#{ url }\", \"\", \"resizable=yes, location=no, width=300, height=640, menubar=no, status=no, scrollbars=yes\"); return false;")
       
-          javascript_tag("var wikiToolbar = new jsToolBar($('#{field_id}')); wikiToolbar.setHelpLink('#{help_link}'); wikiToolbar.draw();")
+          javascript_tag("var wikiToolbar = new jsToolBar($('#{field_id}')); wikiToolbar.setHelpLink('#{escape_javascript help_link}'); wikiToolbar.draw();")
         end
       
         def initial_page_content(page)