diff --git a/doc/arm/Bv9ARM.ch06.html b/doc/arm/Bv9ARM.ch06.html
index fa5c8f145e..7c94195dd5 100644
--- a/doc/arm/Bv9ARM.ch06.html
+++ b/doc/arm/Bv9ARM.ch06.html
@@ -6272,10 +6272,10 @@ CLASS="sect3"
 CLASS="sect3"
 ><A
 NAME="AEN2700"
->6.2.16.3. 6 to 4 Servers</A
+>6.2.16.3. Dual-stack Servers</A
 ></H3
 ><P
->6 to 4 servers are used as servers of last resort to work around
+>Dual-stack servers are used as servers of last resort to work around
 problems in reachability due the lack of support for either IPv4 or IPv6
 on the host machine.</P
 ><P