diff --git a/net/ip/net_context.c b/net/ip/net_context.c
index 7a51a6281f2..834263d5cad 100644
--- a/net/ip/net_context.c
+++ b/net/ip/net_context.c
@@ -302,7 +302,7 @@ int net_context_tcp_send(struct net_buf *buf)
  */
 PROCESS_THREAD(tcp, ev, data, buf, user_data)
 {
-	NET_DBG("tcp %p ev %p data %p buf %p user_data %p next line %d\n",
+	NET_DBG("tcp %p ev %d data %p buf %p user_data %p next line %d\n",
 		process_thread_tcp, ev, data, buf, user_data,
 		process_pt->lc);
 
diff --git a/net/ip/net_core.c b/net/ip/net_core.c
index 699e3a0d226..df58e4a277f 100644
--- a/net/ip/net_core.c
+++ b/net/ip/net_core.c
@@ -858,7 +858,7 @@ static int check_and_send_packet(struct net_buf *buf)
 
 static void net_tx_fiber(void)
 {
-	NET_DBG("Starting TX fiber (stack %d bytes)\n",
+	NET_DBG("Starting TX fiber (stack %zu bytes)\n",
 		sizeof(tx_fiber_stack));
 
 	while (1) {
@@ -906,7 +906,7 @@ static void net_rx_fiber(void)
 {
 	struct net_buf *buf;
 
-	NET_DBG("Starting RX fiber (stack %d bytes)\n",
+	NET_DBG("Starting RX fiber (stack %zu bytes)\n",
 		sizeof(rx_fiber_stack));
 
 	while (1) {
@@ -938,7 +938,7 @@ static void net_timer_fiber(void)
 {
 	clock_time_t next_wakeup;
 
-	NET_DBG("Starting net timer fiber (stack %d bytes)\n",
+	NET_DBG("Starting net timer fiber (stack %zu bytes)\n",
 		sizeof(timer_fiber_stack));
 
 	while (1) {