diff --git a/htdocs/core/lib/usergroups.lib.php b/htdocs/core/lib/usergroups.lib.php
index 3883ae11fb4..dac412f92a6 100644
--- a/htdocs/core/lib/usergroups.lib.php
+++ b/htdocs/core/lib/usergroups.lib.php
@@ -485,7 +485,7 @@ function showSkins($fuser, $edit = 0, $foruserprofile = false)
 		print '<td colspan="'.($colspan - 1).'">';
 		if ($edit) {
 			//print ajax_constantonoff('THEME_TOPMENU_DISABLE_IMAGE', array(), null, 0, 0, 1);
-			print $form->selectarray('THEME_TOPMENU_DISABLE_IMAGE', $listoftopmenumodes, $conf->global->THEME_TOPMENU_DISABLE_IMAGE);
+			print $form->selectarray('THEME_TOPMENU_DISABLE_IMAGE', $listoftopmenumodes, isset($conf->global->THEME_TOPMENU_DISABLE_IMAGE)?$conf->global->THEME_TOPMENU_DISABLE_IMAGE:0);
 		} else {
 			$listoftopmenumodes[$conf->global->THEME_TOPMENU_DISABLE_IMAGE];
 			//print yn($conf->global->THEME_TOPMENU_DISABLE_IMAGE);