Index: head/sys/netinet/tcp_var.h
===================================================================
--- head/sys/netinet/tcp_var.h
+++ head/sys/netinet/tcp_var.h
@@ -113,7 +113,7 @@
 
 	struct	vnet *t_vnet;		/* back pointer to parent vnet */
 
-	tcp_seq	snd_una;		/* send unacknowledged */
+	tcp_seq	snd_una;		/* sent but unacknowledged */
 	tcp_seq	snd_max;		/* highest sequence number sent;
 					 * used to recognize retransmits
 					 */