diff --git a/configs/dk-tm4c129x/README.txt b/configs/dk-tm4c129x/README.txt
index 695797e0ec3..0c8075a2be2 100644
--- a/configs/dk-tm4c129x/README.txt
+++ b/configs/dk-tm4c129x/README.txt
@@ -969,6 +969,7 @@ Where <subdir> is one of the following:
 
          CONFIG_NET_IPv4=y
          CONFIG_NET_ARP=y
+         CONFIG_NET_ARP_SEND=y (optional)
          CONFIG_NET_ICMP=y
          CONFIG_NET_ICMP_PING=y