diff --git a/man/gnt-instance.sgml b/man/gnt-instance.sgml
index e085cdc428a3bb88d09dfd9a65b3d7d66d04f0db..908c25ec32a41d2d31561e740e8213c3920b56c3 100644
--- a/man/gnt-instance.sgml
+++ b/man/gnt-instance.sgml
@@ -1526,6 +1526,8 @@ instance5: 11225
         <cmdsynopsis>
           <command>shutdown</command>
           <sbr>
+          <arg>--timeout=<replaceable>N</replaceable></arg>
+          <sbr>
           <arg>--force-multiple</arg>
           <sbr>
           <group choice="opt">
@@ -1549,6 +1551,13 @@ instance5: 11225
           switching off the power on a physical machine).
         </para>
 
+        <para>
+          The <option>--timeout</option> is used to specify how much time to
+          wait before forcing the shutdown (xm destroy in xen, killing the kvm
+          process, for kvm). By default two minutes are given to each instance
+          to stop.
+        </para>
+
         <para>
           The <option>--instance</option>, <option>--node</option>,
           <option>--primary</option>, <option>--secondary</option> and