Index: sys/netinet/tcp_var.h
===================================================================
--- sys/netinet/tcp_var.h
+++ sys/netinet/tcp_var.h
@@ -104,7 +104,7 @@
 
 	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
 					 */