diff --git a/e107_handlers/admin_ui.php b/e107_handlers/admin_ui.php
index 23133b7dd..d960de441 100644
--- a/e107_handlers/admin_ui.php
+++ b/e107_handlers/admin_ui.php
@@ -6434,7 +6434,8 @@ class e_admin_form_ui extends e_form
 	public function getElementId()
 	{
 		$controller = $this->getController();
-		return str_replace('_', '-', ($controller->getPluginName() == 'core' ? 'core-'.$controller->getTableName() : 'plugin-'.$controller->getPluginName()));
+		$name = str_replace('_', '-', ($controller->getPluginName() == 'core' ? 'core-'.$controller->getTableName() : 'plugin-'.$controller->getPluginName()));
+		return e107::getForm()->name2id($name); // prevent invalid ids.
 	}
 
 	/**