diff --git a/lib/user/session.php b/lib/user/session.php
index cf93d9593afa8f76e4f55a5b6aceb149f6653934..9a6c669e935a8010c8c593c93a59f561c8a6df48 100644
--- a/lib/user/session.php
+++ b/lib/user/session.php
@@ -166,8 +166,8 @@ class Session implements Emitter {
 		unset($_COOKIE["oc_username"]); //TODO: DI
 		unset($_COOKIE["oc_token"]);
 		unset($_COOKIE["oc_remember_login"]);
-		setcookie("oc_username", null, -1);
-		setcookie("oc_token", null, -1);
-		setcookie("oc_remember_login", null, -1);
+		setcookie('oc_username', '', time()-3600, \OC::$WEBROOT);
+		setcookie('oc_token', '', time()-3600, \OC::$WEBROOT);
+		setcookie('oc_remember_login', '', time()-3600, \OC::$WEBROOT);
 	}
 }