diff --git a/en_US.ISO8859-1/books/handbook/pgpkeys/chapter.sgml b/en_US.ISO8859-1/books/handbook/pgpkeys/chapter.sgml
index 2504fde237..d2163a0a33 100644
--- a/en_US.ISO8859-1/books/handbook/pgpkeys/chapter.sgml
+++ b/en_US.ISO8859-1/books/handbook/pgpkeys/chapter.sgml
@@ -171,6 +171,11 @@
       &pgpkey.cjc;
     </sect2>
 
+    <sect2 id="pgpkey-marck">
+      <title>&a.marck;</title>
+      &pgpkey.marck;
+    </sect2>
+
     <sect2 id="pgpkey-marcus">
       <title>&a.marcus;</title>
       &pgpkey.marcus;