Index: head/sys/dev/usb/net/if_smsc.c
===================================================================
--- head/sys/dev/usb/net/if_smsc.c
+++ head/sys/dev/usb/net/if_smsc.c
@@ -452,7 +452,7 @@
 		goto done;
 	}
 
-	addr = (phy << 11) | (reg << 6) | SMSC_MII_READ;
+	addr = (phy << 11) | (reg << 6) | SMSC_MII_READ | SMSC_MII_BUSY;
 	smsc_write_reg(sc, SMSC_MII_ADDR, addr);
 
 	if (smsc_wait_for_bits(sc, SMSC_MII_ADDR, SMSC_MII_BUSY) != 0)
@@ -505,7 +505,7 @@
 	val = htole32(val);
 	smsc_write_reg(sc, SMSC_MII_DATA, val);
 
-	addr = (phy << 11) | (reg << 6) | SMSC_MII_WRITE;
+	addr = (phy << 11) | (reg << 6) | SMSC_MII_WRITE | SMSC_MII_BUSY;
 	smsc_write_reg(sc, SMSC_MII_ADDR, addr);
 
 	if (smsc_wait_for_bits(sc, SMSC_MII_ADDR, SMSC_MII_BUSY) != 0)