diff --git a/doc/arm/Bv9ARM-book.xml b/doc/arm/Bv9ARM-book.xml
index e4d61edbb9..dfee50f144 100644
--- a/doc/arm/Bv9ARM-book.xml
+++ b/doc/arm/Bv9ARM-book.xml
@@ -6518,7 +6518,7 @@ options {
 	    <varlistentry>
 	      <term><command>nocookie-udp-size</command></term>
 	      <listitem>
-		</para>
+		<para>
 		  Sets the maximum size of UDP responses that will be
 		  sent to queries without a valid server COOKIE. A value
 		  below 128 will be silently raised to 128. The default