diff --git a/hw/net/e1000.c b/hw/net/e1000.c
index 151d25e0b7..70a59fde7f 100644
--- a/hw/net/e1000.c
+++ b/hw/net/e1000.c
@@ -401,6 +401,7 @@ static void e1000_reset(void *opaque)
         d->mac_reg[RA] |= macaddr[i] << (8 * i);
         d->mac_reg[RA + 1] |= (i < 2) ? macaddr[i + 4] << (8 * i) : 0;
     }
+    qemu_format_nic_info_str(qemu_get_queue(d->nic), macaddr);
 }
 
 static void
@@ -1105,7 +1106,15 @@ mac_read_clr8(E1000State *s, int index)
 static void
 mac_writereg(E1000State *s, int index, uint32_t val)
 {
+    uint32_t macaddr[2];
+
     s->mac_reg[index] = val;
+
+    if (index == RA + 1) {
+        macaddr[0] = cpu_to_le32(s->mac_reg[RA]);
+        macaddr[1] = cpu_to_le32(s->mac_reg[RA + 1]);
+        qemu_format_nic_info_str(qemu_get_queue(s->nic), (uint8_t *)macaddr);
+    }
 }
 
 static void
diff --git a/hw/net/rtl8139.c b/hw/net/rtl8139.c
index c31199f8c8..3225f3d3e5 100644
--- a/hw/net/rtl8139.c
+++ b/hw/net/rtl8139.c
@@ -1214,6 +1214,7 @@ static void rtl8139_reset(DeviceState *d)
 
     /* restore MAC address */
     memcpy(s->phys, s->conf.macaddr.a, 6);
+    qemu_format_nic_info_str(qemu_get_queue(s->nic), s->phys);
 
     /* reset interrupt mask */
     s->IntrStatus = 0;
@@ -2740,9 +2741,13 @@ static void rtl8139_io_writeb(void *opaque, uint8_t addr, uint32_t val)
 
     switch (addr)
     {
-        case MAC0 ... MAC0+5:
+        case MAC0 ... MAC0+4:
             s->phys[addr - MAC0] = val;
             break;
+        case MAC0+5:
+            s->phys[addr - MAC0] = val;
+            qemu_format_nic_info_str(qemu_get_queue(s->nic), s->phys);
+            break;
         case MAC0+6 ... MAC0+7:
             /* reserved */
             break;