Index: sys/dev/e1000/if_em.c
===================================================================
--- sys/dev/e1000/if_em.c
+++ sys/dev/e1000/if_em.c
@@ -1061,9 +1061,17 @@
 	}
 
 	if (!em_is_valid_ether_addr(hw->mac.addr)) {
-		device_printf(dev, "Invalid MAC address\n");
-		error = EIO;
-		goto err_late;
+		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));
+		} else {
+			device_printf(dev, "Invalid MAC address\n");
+			error = EIO;
+			goto err_late;
+		}
 	}
 
 	/* Disable ULP support */