diff --git a/extensions/help/resources/content/helpSecurityOverlay.xul b/extensions/help/resources/content/helpSecurityOverlay.xul
index 484d40a5a346..1c6890d4afb7 100644
--- a/extensions/help/resources/content/helpSecurityOverlay.xul
+++ b/extensions/help/resources/content/helpSecurityOverlay.xul
@@ -145,7 +145,8 @@
ondialoghelp="openHelp('cert_backup_pwd');"/>