diff --git a/bin/dig/dig.docbook b/bin/dig/dig.docbook
index e918822839..9ab93d64c3 100644
--- a/bin/dig/dig.docbook
+++ b/bin/dig/dig.docbook
@@ -937,7 +937,7 @@
         </varlistentry>
 
         <varlistentry>
-          <term><option>+[no]subnet=addr/prefix<option></term>
+          <term><option>+[no]subnet=addr/prefix</option></term>
           <listitem>
             <para>
 	      Send an EDNS Client Subnet option with the speciifed