diff --git a/api/js/etemplate/et2_widget_box.ts b/api/js/etemplate/et2_widget_box.ts
index a39730744c..17421ad3cc 100644
--- a/api/js/etemplate/et2_widget_box.ts
+++ b/api/js/etemplate/et2_widget_box.ts
@@ -162,7 +162,7 @@ export class et2_box extends et2_baseWidget implements et2_IDetachedDOM
 	}
 
 }
-et2_register_widget(et2_box, ["vbox", "box", "old-vbox", "old-box"]);
+et2_register_widget(et2_box, ["vbox", "box", "old-vbox", "old-box", "old-hbox"]);
 
 /**
  * Details widget implementation
diff --git a/api/src/Etemplate/Widget/Box.php b/api/src/Etemplate/Widget/Box.php
index a873cc0551..7d052e7e32 100644
--- a/api/src/Etemplate/Widget/Box.php
+++ b/api/src/Etemplate/Widget/Box.php
@@ -147,4 +147,4 @@ class Box extends Etemplate\Widget
 	}
 }
 // register class for layout widgets, which can have an own namespace
-Etemplate\Widget::registerWidget(__NAMESPACE__.'\\Box', array('box', 'hbox', 'vbox', 'groupbox'));
+Etemplate\Widget::registerWidget(__NAMESPACE__.'\\Box', array('box', 'hbox', 'vbox', 'groupbox', 'old-box', 'old-vbox', 'old-hbox'));
\ No newline at end of file