diff --git a/etc/defaults/rc.conf b/etc/defaults/rc.conf
index 3638add65a67..ec54d391908a 100644
--- a/etc/defaults/rc.conf
+++ b/etc/defaults/rc.conf
@@ -232,7 +232,7 @@ stf_interface_ipv4plen="0"	# Prefix length for 6to4 IPv4 addr,
 stf_interface_ipv6_ifid="0:0:0:1"	# IPv6 interface id for stf0.
 				# If you like, you can set "AUTO" for this.
 stf_interface_ipv6_slaid="0000"	# IPv6 Site Level Aggregator for stf0
-ipv6_ipv4mapping="YES";		# Set to brank to disable IPv4 mapped IPv6 addr
+ipv6_ipv4mapping="YES";		# Leave empty to disable IPv4 mapped IPv6 addr
 				# communication. (like ::ffff:a.b.c.d)
 
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