Index: uspace/srv/net/tcp/conn.c
===================================================================
--- uspace/srv/net/tcp/conn.c	(revision 9713b0b213e041e8599c2108c67fa8c0a95be59c)
+++ uspace/srv/net/tcp/conn.c	(revision 0a1e7e4d2a546c77ee164eecd49445abce8f9415)
@@ -206,4 +206,6 @@
 {
 	log_msg(LOG_DEFAULT, LVL_DEBUG, "%s: tcp_conn_free(%p)", conn->name, conn);
+
+	assert(conn->mapped == false);
 	tcp_tqueue_fini(&conn->retransmit);
 
@@ -283,5 +285,4 @@
 	log_msg(LOG_DEFAULT, LVL_DEBUG, "%s: tcp_conn_delete(%p)", conn->name, conn);
 
-	assert(conn->mapped == false);
 	assert(conn->deleted == false);
 	conn->deleted = true;