diff --git a/sys/dev/e1000/if_em.c b/sys/dev/e1000/if_em.c
--- a/sys/dev/e1000/if_em.c
+++ b/sys/dev/e1000/if_em.c
@@ -1076,11 +1076,8 @@
 
 	if (!em_is_valid_ether_addr(hw->mac.addr)) {
 		if (adapter->vf_ifp) {
-			u8 addr[ETHER_ADDR_LEN];
-			arc4rand(&addr, sizeof(addr), 0);
-			addr[0] &= 0xFE;
-			addr[0] |= 0x02;
-			bcopy(addr, hw->mac.addr, sizeof(addr));
+			ether_gen_addr(iflib_get_ifp(ctx),
+			    (struct ether_addr *)hw->mac.addr);
 		} else {
 			device_printf(dev, "Invalid MAC address\n");
 			error = EIO;
diff --git a/sys/dev/ixgbe/if_ixv.c b/sys/dev/ixgbe/if_ixv.c
--- a/sys/dev/ixgbe/if_ixv.c
+++ b/sys/dev/ixgbe/if_ixv.c
@@ -465,12 +465,10 @@
 
 	/* If no mac address was assigned, make a random one */
 	if (!ixv_check_ether_addr(hw->mac.addr)) {
-		u8 addr[ETHER_ADDR_LEN];
-		arc4rand(&addr, sizeof(addr), 0);
-		addr[0] &= 0xFE;
-		addr[0] |= 0x02;
-		bcopy(addr, hw->mac.addr, sizeof(addr));
-		bcopy(addr, hw->mac.perm_addr, sizeof(addr));
+		ether_gen_addr(iflib_get_ifp(ctx),
+		    (struct ether_addr *)hw->mac.addr);
+		bcopy(hw->mac.addr, hw->mac.perm_addr,
+		    sizeof(hw->mac.perm_addr));
 	}
 
 	/* Most of the iflib initialization... */
diff --git a/sys/dev/ixl/if_iavf.c b/sys/dev/ixl/if_iavf.c
--- a/sys/dev/ixl/if_iavf.c
+++ b/sys/dev/ixl/if_iavf.c
@@ -433,13 +433,9 @@
 	iavf_dbg_init(sc, "Resource Acquisition complete\n");
 
 	/* If no mac address was assigned just make a random one */
-	if (!iavf_check_ether_addr(hw->mac.addr)) {
-		u8 addr[ETHER_ADDR_LEN];
-		arc4rand(&addr, sizeof(addr), 0);
-		addr[0] &= 0xFE;
-		addr[0] |= 0x02;
-		bcopy(addr, hw->mac.addr, sizeof(addr));
-	}
+	if (!iavf_check_ether_addr(hw->mac.addr))
+		ether_gen_addr(iflib_get_ifp(ctx),
+		    (struct ether_addr *)hw->mac.addr);
 	bcopy(hw->mac.addr, hw->mac.perm_addr, ETHER_ADDR_LEN);
 	iflib_set_mac(ctx, hw->mac.addr);