diff --git a/include/net/net_core.h b/include/net/net_core.h
index 11a7c308118..8a9f50d7e16 100644
--- a/include/net/net_core.h
+++ b/include/net/net_core.h
@@ -195,8 +195,8 @@ static inline void net_analyze_stack(const char *name,
 	net_analyze_stack_get_values(stack, size, &stack_offset,
 				     &pcnt, &unused);
 
-	NET_INFO("net (%p): %s stack real size %u "
-		 "unused %u usage %u/%u (%u %%)",
+	NET_INFO("net (%p): %s stack real size %zu "
+		 "unused %u usage %zu/%zu (%u %%)",
 		 k_current_get(), name,
 		 size + stack_offset, unused, size - unused, size, pcnt);
 }
diff --git a/subsys/net/buf.c b/subsys/net/buf.c
index 7e545dc4ded..0898fd82422 100644
--- a/subsys/net/buf.c
+++ b/subsys/net/buf.c
@@ -183,7 +183,7 @@ void net_buf_reserve(struct net_buf *buf, size_t reserve)
 {
 	NET_BUF_ASSERT(buf);
 	NET_BUF_ASSERT(buf->len == 0);
-	NET_BUF_DBG("buf %p reserve %u", buf, reserve);
+	NET_BUF_DBG("buf %p reserve %zu", buf, reserve);
 
 	buf->data = buf->__buf + reserve;
 }
@@ -341,7 +341,7 @@ void *net_buf_simple_add(struct net_buf_simple *buf, size_t len)
 {
 	uint8_t *tail = net_buf_simple_tail(buf);
 
-	NET_BUF_SIMPLE_DBG("buf %p len %u", buf, len);
+	NET_BUF_SIMPLE_DBG("buf %p len %zu", buf, len);
 
 	NET_BUF_SIMPLE_ASSERT(net_buf_simple_tailroom(buf) >= len);
 
@@ -395,7 +395,7 @@ void net_buf_simple_add_be32(struct net_buf_simple *buf, uint32_t val)
 
 void *net_buf_simple_push(struct net_buf_simple *buf, size_t len)
 {
-	NET_BUF_SIMPLE_DBG("buf %p len %u", buf, len);
+	NET_BUF_SIMPLE_DBG("buf %p len %zu", buf, len);
 
 	NET_BUF_SIMPLE_ASSERT(net_buf_simple_headroom(buf) >= len);
 
@@ -429,7 +429,7 @@ void net_buf_simple_push_u8(struct net_buf_simple *buf, uint8_t val)
 
 void *net_buf_simple_pull(struct net_buf_simple *buf, size_t len)
 {
-	NET_BUF_SIMPLE_DBG("buf %p len %u", buf, len);
+	NET_BUF_SIMPLE_DBG("buf %p len %zu", buf, len);
 
 	NET_BUF_SIMPLE_ASSERT(buf->len >= len);
 
diff --git a/subsys/net/ip/l2/ieee802154/ieee802154_frame.c b/subsys/net/ip/l2/ieee802154/ieee802154_frame.c
index 66f88c4ca15..91b0625843e 100644
--- a/subsys/net/ip/l2/ieee802154/ieee802154_frame.c
+++ b/subsys/net/ip/l2/ieee802154/ieee802154_frame.c
@@ -280,7 +280,7 @@ validate_payload_and_mfr(struct ieee802154_mpdu *mpdu,
 	payload_length = length - (p_buf - buf) - IEEE802154_MFR_LENGTH;
 
 	NET_DBG("Header size: %u, vs total length %u: payload size %u",
-		p_buf - buf, length, payload_length);
+		(uint32_t)(p_buf - buf), length, payload_length);
 
 	if (type == IEEE802154_FRAME_TYPE_BEACON) {
 		if (!validate_beacon(mpdu, p_buf, payload_length)) {