diff --git a/docbook/buildiso.xml b/docbook/buildiso.xml
index 6063ebb..cd4f9d6 100644
--- a/docbook/buildiso.xml
+++ b/docbook/buildiso.xml
@@ -104,11 +104,17 @@
 			</varlistentry>
 
 			<varlistentry>
-				<term><option>-i systend|openrc</option></term>
+				<term><option>-i systemd|openrc</option></term>
 
 				<listitem><para>The init system on the iso</para></listitem>
 			</varlistentry>
 
+			<varlistentry>
+				<term><option>-s</option></term>
+
+				<listitem><para>Sign the iso.</para></listitem>
+			</varlistentry>
+
 			<varlistentry>
 				<term><option>-k linuxXXX</option></term>