diff --git a/doc/README.drivers.eth b/doc/README.drivers.eth
index d0c3571..eb83038 100644
--- a/doc/README.drivers.eth
+++ b/doc/README.drivers.eth
@@ -70,6 +70,7 @@
 	dev->halt = ape_halt;
 	dev->send = ape_send;
 	dev->recv = ape_recv;
+	dev->write_hwaddr = ape_write_hwaddr;
 
 	eth_register(dev);
 
@@ -102,11 +103,12 @@
  -----------
 
 Now that we've registered with the ethernet layer, we can start getting some
-real work done.  You will need four functions:
+real work done.  You will need five functions:
 	int ape_init(struct eth_device *dev, bd_t *bis);
 	int ape_send(struct eth_device *dev, volatile void *packet, int length);
 	int ape_recv(struct eth_device *dev);
 	int ape_halt(struct eth_device *dev);
+	int ape_write_hwaddr(struct eth_device *dev);
 
 The init function checks the hardware (probing/identifying) and gets it ready
 for send/recv operations.  You often do things here such as resetting the MAC
@@ -150,6 +152,9 @@
 its reset state.  It can be called at any time (before any call to the related
 init function), so make sure it can handle this sort of thing.
 
+The write_hwaddr function should program the MAC address stored in dev->enetaddr
+into the Ethernet controller.
+
 So the call graph at this stage would look something like:
 some net operation (ping / tftp / whatever...)
 	eth_init()