diff --git a/drivers/isdn/gigaset/usb-gigaset.c b/drivers/isdn/gigaset/usb-gigaset.c
index 1b9b43659bdf..61eed0d92e41 100644
--- a/drivers/isdn/gigaset/usb-gigaset.c
+++ b/drivers/isdn/gigaset/usb-gigaset.c
@@ -703,6 +703,8 @@ static int gigaset_probe(struct usb_interface *interface,
 	usb_set_intfdata(interface, cs);
 
 	endpoint = &hostif->endpoint[0].desc;
+        if (!endpoint)
+		return -ENODEV;
 
 	buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
 	ucs->bulk_out_size = buffer_size;