diff --git a/src/net/netdevice.c b/src/net/netdevice.c
index be3d1ffe..2827775b 100644
--- a/src/net/netdevice.c
+++ b/src/net/netdevice.c
@@ -91,6 +91,10 @@ int netdev_tx ( struct net_device *netdev, struct pk_buff *pkb ) {
 void netdev_tx_complete ( struct net_device *netdev, struct pk_buff *pkb ) {
 	DBGC ( netdev, "NETDEV %p transmission %p complete\n", netdev, pkb );
 
+	/* Catch data corruption as early as possible */
+	assert ( pkb->list.next != NULL );
+	assert ( pkb->list.prev != NULL );
+
 	list_del ( &pkb->list );
 	free_pkb ( pkb );
 }