diff --git a/doc/arm/Bv9ARM-book.xml b/doc/arm/Bv9ARM-book.xml
index ddeb8e1c7f..c16e03efe6 100644
--- a/doc/arm/Bv9ARM-book.xml
+++ b/doc/arm/Bv9ARM-book.xml
@@ -7637,7 +7637,8 @@ options {
 		<para>
 		  Specifies a list of addresses to which
 		  <command>filter-aaaa-on-v4</command>
-		  is applies.  The default is <userinput>any</userinput>.
+		  and <command>filter-aaaa-on-v6</command>
+		  apply.  The default is <userinput>any</userinput>.
 		</para>
 	      </listitem>
 	    </varlistentry>