diff --git a/drivers/net/usb/gl620a.c b/drivers/net/usb/gl620a.c
index 13a9a83b8538..08693eb89a3c 100644
--- a/drivers/net/usb/gl620a.c
+++ b/drivers/net/usb/gl620a.c
@@ -169,7 +169,7 @@ genelink_tx_fixup(struct usbnet *dev, struct sk_buff *skb, gfp_t flags)
 	*packet_len = cpu_to_le32(length);
 
 	// add padding byte
-	if ((skb->len % dev->maxpacket) == 0)
+	if (dev->maxpacket && (skb->len % dev->maxpacket) == 0)
 		skb_put(skb, 1);
 
 	return skb;
diff --git a/drivers/net/usb/usbnet.c b/drivers/net/usb/usbnet.c
index 840c1c2ab16a..2ec943b71271 100644
--- a/drivers/net/usb/usbnet.c
+++ b/drivers/net/usb/usbnet.c
@@ -1401,7 +1401,7 @@ netdev_tx_t usbnet_start_xmit (struct sk_buff *skb,
 	 * handling ZLP/short packets, so cdc_ncm driver will make short
 	 * packet itself if needed.
 	 */
-	if (length % dev->maxpacket == 0) {
+	if (dev->maxpacket && length % dev->maxpacket == 0) {
 		if (!(info->flags & FLAG_SEND_ZLP)) {
 			if (!(info->flags & FLAG_MULTI_PACKET)) {
 				length++;