diff --git a/BasiliskII/src/slirp/tcp_input.c b/BasiliskII/src/slirp/tcp_input.c
index 032e5378..5c06f16f 100644
--- a/BasiliskII/src/slirp/tcp_input.c
+++ b/BasiliskII/src/slirp/tcp_input.c
@@ -292,7 +292,11 @@ void tcp_input(register struct mbuf *m, int iphlen, struct socket *inso)
 	 * Checksum extended TCP header and data.
 	 */
 	tlen = ((struct ip *)ti)->ip_len;
-	ti->ti_next = ti->ti_prev = 0;
+	//ti->ti_next = ti->ti_prev = 0;
+	
+	tcpiphdr2qlink(ti)->next = tcpiphdr2qlink(ti)->prev = 0;
+	memset(&ti->ti_i.ih_mbuf, 0 , sizeof(struct mbuf_ptr));
+	
 	ti->ti_x1 = 0;
 	ti->ti_len = htons((u_int16_t)tlen);
 	len = sizeof(struct ip) + tlen;
diff --git a/BasiliskII/src/slirp/udp.c b/BasiliskII/src/slirp/udp.c
index deedb1e7..9d805ff3 100644
--- a/BasiliskII/src/slirp/udp.c
+++ b/BasiliskII/src/slirp/udp.c
@@ -272,7 +272,10 @@ int udp_output2(struct socket *so, struct mbuf *m,
 	 * and addresses and length put into network format.
 	 */
 	ui = mtod(m, struct udpiphdr *);
-	ui->ui_next = ui->ui_prev = 0;
+	//ui->ui_next = ui->ui_prev = 0;
+	
+	memset(&ui->ui_i.ih_mbuf, 0 , sizeof(struct mbuf_ptr));
+	
 	ui->ui_x1 = 0;
 	ui->ui_pr = IPPROTO_UDP;
 	ui->ui_len = htons((u_short) (m->m_len - sizeof(struct ip))); /* + sizeof (struct udphdr)); */