diff --git a/doc/ostree-gpg-sign.xml b/doc/ostree-gpg-sign.xml
index 0c7ab7d4..44ddb655 100644
--- a/doc/ostree-gpg-sign.xml
+++ b/doc/ostree-gpg-sign.xml
@@ -68,6 +68,14 @@ Boston, MA 02111-1307, USA.
         <title>Options</title>
 
         <variablelist>
+            <varlistentry>
+                <term><option>--delete</option></term>
+
+                <listitem><para>
+                    Delete signatures having any of the GPG KEY-IDs.
+                </para></listitem>
+            </varlistentry>
+
             <varlistentry>
                 <term><option>--gpg-homedir</option>="HOMEDIR"</term>