diff --git a/drivers/net/wimax/i2400m/netdev.c b/drivers/net/wimax/i2400m/netdev.c
index fefd794087ad..e7d1a51ee3fe 100644
--- a/drivers/net/wimax/i2400m/netdev.c
+++ b/drivers/net/wimax/i2400m/netdev.c
@@ -358,6 +358,20 @@ netdev_tx_t i2400m_hard_start_xmit(struct sk_buff *skb,
 	int result;
 
 	d_fnstart(3, dev, "(skb %p net_dev %p)\n", skb, net_dev);
+	if (skb_header_cloned(skb)) {
+		/*
+		 * Make tcpdump/wireshark happy -- if they are
+		 * running, the skb is cloned and we will overwrite
+		 * the mac fields in i2400m_tx_prep_header. Expand
+		 * seems to fix this...
+		 */
+		result = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
+		if (result) {
+			result = NETDEV_TX_BUSY;
+			goto error_expand;
+		}
+	}
+
 	if (i2400m->state == I2400M_SS_IDLE)
 		result = i2400m_net_wake_tx(i2400m, net_dev, skb);
 	else
@@ -368,10 +382,11 @@ netdev_tx_t i2400m_hard_start_xmit(struct sk_buff *skb,
 		net_dev->stats.tx_packets++;
 		net_dev->stats.tx_bytes += skb->len;
 	}
+	result = NETDEV_TX_OK;
+error_expand:
 	kfree_skb(skb);
-
-	d_fnend(3, dev, "(skb %p net_dev %p)\n", skb, net_dev);
-	return NETDEV_TX_OK;
+	d_fnend(3, dev, "(skb %p net_dev %p) = %d\n", skb, net_dev, result);
+	return result;
 }