diff --git a/configs/twr-k60n512/README.txt b/configs/twr-k60n512/README.txt
index 1b7994f103..d5710a38a7 100644
--- a/configs/twr-k60n512/README.txt
+++ b/configs/twr-k60n512/README.txt
@@ -560,6 +560,7 @@ TWR-K60N512-specific Configuration Options
     CONFIG_ENET_NBUFFERS - Number of TX/RX buffers.  The size of one
         buffer is determined by CONFIG_NET_BUFSIZE.  Default: 8
     CONFIG_ENET_USEMII - Usee MII mode.  Default: RMII mode.
+    CONFIG_ENET_PHYADDR - PHY address
  
 Configurations
 ==============