diff --git a/drivers/ethernet/eth.h b/drivers/ethernet/eth.h
index ebbff29a9d9..f7e7ab79a4a 100644
--- a/drivers/ethernet/eth.h
+++ b/drivers/ethernet/eth.h
@@ -32,10 +32,6 @@
 
 static inline void gen_random_mac(uint8_t *mac_addr, uint8_t b0, uint8_t b1, uint8_t b2)
 {
-	uint32_t entropy;
-
-	entropy = sys_rand32_get();
-
 	mac_addr[0] = b0;
 	mac_addr[1] = b1;
 	mac_addr[2] = b2;
@@ -43,9 +39,7 @@ static inline void gen_random_mac(uint8_t *mac_addr, uint8_t b0, uint8_t b1, uin
 	/* Set MAC address locally administered, unicast (LAA) */
 	mac_addr[0] |= 0x02;
 
-	mac_addr[3] = (entropy >> 16) & 0xff;
-	mac_addr[4] = (entropy >>  8) & 0xff;
-	mac_addr[5] = (entropy >>  0) & 0xff;
+	sys_rand_get(&mac_addr[3], 3U);
 }
 
 #endif /* ZEPHYR_DRIVERS_ETHERNET_ETH_H_ */
diff --git a/drivers/ethernet/eth_ivshmem.c b/drivers/ethernet/eth_ivshmem.c
index 0d2c104359a..ae8135f2e22 100644
--- a/drivers/ethernet/eth_ivshmem.c
+++ b/drivers/ethernet/eth_ivshmem.c
@@ -390,10 +390,7 @@ static const struct ethernet_api eth_ivshmem_api = {
 #define ETH_IVSHMEM_RANDOM_MAC_ADDR(inst)						\
 	static void generate_mac_addr_##inst(uint8_t mac_addr[6])			\
 	{										\
-		uint32_t entropy = sys_rand32_get();					\
-		mac_addr[0] = (entropy >> 16) & 0xff;					\
-		mac_addr[1] = (entropy >>  8) & 0xff;					\
-		mac_addr[2] = (entropy >>  0) & 0xff;					\
+		sys_rand_get(mac_addr, 3U);						\
 		/* Clear multicast bit */						\
 		mac_addr[0] &= 0xFE;							\
 		gen_random_mac(mac_addr, mac_addr[0], mac_addr[1], mac_addr[2]);	\