diff --git a/lib/private/user.php b/lib/private/user.php
index b68786c773..6b350d4cf1 100644
--- a/lib/private/user.php
+++ b/lib/private/user.php
@@ -325,7 +325,7 @@ class OC_User {
 			return $backend->getLogoutAttribute();
 		}
 
-		return "href=" . link_to('', 'index.php') . "?logout=true";
+		return 'href="' . link_to('', 'index.php') . '?logout=true"';
 	}
 
 	/**