diff --git a/htdocs/core/js/lib_head.js.php b/htdocs/core/js/lib_head.js.php
index c0d4f0f3829..9a0eaf0e0ed 100644
--- a/htdocs/core/js/lib_head.js.php
+++ b/htdocs/core/js/lib_head.js.php
@@ -1138,7 +1138,7 @@ $(document).ready(function() {
 
 // Force to hide menus when page is inside an iFrame
 $(document).ready(function() {
-	if (window.location !== window.parent.location ) {
+	if (window.location && window.location.pathname.indexOf("externalsite/frametop.php") == -1 && window.location !== window.parent.location ) {
 		console.log("Page is detected to be into an iframe, we hide by CSS the menus");
 		// The page is in an iframe
 		jQuery(".side-nav-vert, .side-nav, .websitebar").hide();