diff --git a/hw/net/e1000.c b/hw/net/e1000.c
index ae6359117d..8387443ee3 100644
--- a/hw/net/e1000.c
+++ b/hw/net/e1000.c
@@ -1106,7 +1106,7 @@ mac_writereg(E1000State *s, int index, uint32_t val)
 
     s->mac_reg[index] = val;
 
-    if (index == RA || index == RA + 1) {
+    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);
diff --git a/hw/net/rtl8139.c b/hw/net/rtl8139.c
index 7f2b4db449..5329f44a9d 100644
--- a/hw/net/rtl8139.c
+++ b/hw/net/rtl8139.c
@@ -2741,7 +2741,10 @@ 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;