diff --git a/options.xhtml b/options.xhtml
index eb42e1c59..880347cea 100644
--- a/options.xhtml
+++ b/options.xhtml
@@ -25448,7 +25448,7 @@ attribute set of string</p>
 Valid values are <code class="literal">openpgp</code> (OpenPGP/GnuPG), <code class="literal">ssh</code> (SSH), and <code class="literal">x509</code> (X.509 certificates).</p>
 
 <p><span class="emphasis"><em>Type:</em></span>
-one of “openpgp”, “ssh”, “x509”</p>
+null or one of “openpgp”, “ssh”, “x509”</p>
 
 <p><span class="emphasis"><em>Default:</em></span></p><pre><code class="programlisting">&quot;openpgp&quot; for state version &lt; 25.05,
 undefined for state version ≥ 25.05
@@ -25499,10 +25499,10 @@ null or string</p>
 <p>Whether commits and tags should be signed by default.</p>
 
 <p><span class="emphasis"><em>Type:</em></span>
-boolean</p>
+null or boolean</p>
 
 <p><span class="emphasis"><em>Default:</em></span>
-<code class="literal">false</code></p>
+<code class="literal">null</code></p>
 
 <p><span class="emphasis"><em>Declared by:</em></span></p>
 <table border="0" summary="Simple list" class="simplelist">
@@ -25523,7 +25523,7 @@ boolean</p>
 <p>Path to signer binary to use.</p>
 
 <p><span class="emphasis"><em>Type:</em></span>
-string</p>
+null or string</p>
 
 <p><span class="emphasis"><em>Declared by:</em></span></p>
 <table border="0" summary="Simple list" class="simplelist">