diff --git a/skins/larry/templates/error.html b/skins/larry/templates/error.html
index a65733eb0..85fb4e7a9 100644
--- a/skins/larry/templates/error.html
+++ b/skins/larry/templates/error.html
@@ -5,7 +5,7 @@
 <roundcube:include file="/includes/links.html" />
 </head>
 <roundcube:if condition="!env:framed" />
-<body class="error">
+<roundcube:if condition="env:extwin" /><body class="error extwin"><roundcube:else /><body class="error"><roundcube:endif />
 <roundcube:include file="/includes/header.html" />
 <roundcube:else />
 <body class="error iframe">
