diff --git a/pkg/lwip/contrib/netdev/lwip_netdev.c b/pkg/lwip/contrib/netdev/lwip_netdev.c
index ffc86384419623d8814968e2fbddf66ec375aec1..cb9246aa8aa13a1558ecdda65a5fdf3a87fa0f55 100644
--- a/pkg/lwip/contrib/netdev/lwip_netdev.c
+++ b/pkg/lwip/contrib/netdev/lwip_netdev.c
@@ -185,15 +185,24 @@ static err_t _eth_link_output(struct netif *netif, struct pbuf *p)
     pbuf_header(p, -ETH_PAD_SIZE); /* drop the padding word */
 #endif
     LL_COUNT(p, q, count);
-    struct iovec pkt[count];
+    iolist_t iolist[count];
+
+    /* make last point to the last entry of iolist[] */
+    iolist_t *last = &iolist[count];
+    last--;
+
     for (q = p, count = 0; q != NULL; q = q->next, count++) {
-        pkt[count].iov_base = q->payload;
-        pkt[count].iov_len = (size_t)q->len;
+        iolist_t *iol = &iolist[count];
+
+        iol->iol_next = (iol == last) ? NULL : &iolist[count + 1];
+
+        iol->iol_base = q->payload;
+        iol->iol_len = (size_t)q->len;
     }
 #if ETH_PAD_SIZE
     pbuf_header(p, ETH_PAD_SIZE); /* reclaim the padding word */
 #endif
-    return (netdev->driver->send(netdev, pkt, count) > 0) ? ERR_OK : ERR_BUF;
+    return (netdev->driver->send(netdev, iolist) > 0) ? ERR_OK : ERR_BUF;
 }
 #endif
 
@@ -202,12 +211,12 @@ static err_t _ieee802154_link_output(struct netif *netif, struct pbuf *p)
 {
     LWIP_ASSERT("p->next == NULL", p->next == NULL);
     netdev_t *netdev = (netdev_t *)netif->state;
-    struct iovec pkt = {
-        .iov_base = p->payload,
-        .iov_len = (p->len - IEEE802154_FCS_LEN),   /* FCS is written by driver */
+    iolist_t pkt = {
+        .iol_base = p->payload,
+        .iol_len = (p->len - IEEE802154_FCS_LEN),   /* FCS is written by driver */
     };
 
-    return (netdev->driver->send(netdev, &pkt, 1) > 0) ? ERR_OK : ERR_BUF;
+    return (netdev->driver->send(netdev, &pkt) > 0) ? ERR_OK : ERR_BUF;
 }
 #endif
 
diff --git a/tests/lwip_sock_ip/stack.c b/tests/lwip_sock_ip/stack.c
index 52e58a3f526db4c7aee55018e55940d27810d592..23ee9cabf99ac891c059f85de1ae4fb9b3568eed 100644
--- a/tests/lwip_sock_ip/stack.c
+++ b/tests/lwip_sock_ip/stack.c
@@ -141,16 +141,16 @@ static int _netdev_recv(netdev_t *dev, char *buf, int len, void *info)
     return res;
 }
 
-static int _netdev_send(netdev_t *dev, const struct iovec *vector, int count)
+static int _netdev_send(netdev_t *dev, const iolist_t *iolist)
 {
     msg_t done = { .type = _SEND_DONE };
     unsigned offset = 0;
 
     (void)dev;
     mutex_lock(&_netdev_buffer_mutex);
-    for (int i = 0; i < count; i++) {
-        memcpy(&_netdev_buffer[offset], vector[i].iov_base, vector[i].iov_len);
-        offset += vector[i].iov_len;
+    for (; iolist; iolist = iolist->iol_next) {
+        memcpy(&_netdev_buffer[offset], iolist->iol_base, iolist->iol_len);
+        offset += iolist->iol_len;
         if (offset > sizeof(_netdev_buffer)) {
             mutex_unlock(&_netdev_buffer_mutex);
             return -ENOBUFS;
diff --git a/tests/lwip_sock_udp/stack.c b/tests/lwip_sock_udp/stack.c
index 45539cb478e7a10c45c764231e6a0c94167f656c..cdde693b293c0b09bb378892d66256684aaa2687 100644
--- a/tests/lwip_sock_udp/stack.c
+++ b/tests/lwip_sock_udp/stack.c
@@ -143,16 +143,16 @@ static int _netdev_recv(netdev_t *dev, char *buf, int len, void *info)
     return res;
 }
 
-static int _netdev_send(netdev_t *dev, const struct iovec *vector, int count)
+static int _netdev_send(netdev_t *dev, const iolist_t *iolist)
 {
     msg_t done = { .type = _SEND_DONE };
     unsigned offset = 0;
 
     (void)dev;
     mutex_lock(&_netdev_buffer_mutex);
-    for (int i = 0; i < count; i++) {
-        memcpy(&_netdev_buffer[offset], vector[i].iov_base, vector[i].iov_len);
-        offset += vector[i].iov_len;
+    for (; iolist; iolist = iolist->iol_next) {
+        memcpy(&_netdev_buffer[offset], iolist->iol_base, iolist->iol_len);
+        offset += iolist->iol_len;
         if (offset > sizeof(_netdev_buffer)) {
             mutex_unlock(&_netdev_buffer_mutex);
             return -ENOBUFS;