diff --git a/options.xhtml b/options.xhtml
index 98eec8e52..c20a44c2f 100644
--- a/options.xhtml
+++ b/options.xhtml
@@ -71556,7 +71556,7 @@ boolean</p>
 <p>The tmux package to use.</p>
 
 <p><span class="emphasis"><em>Type:</em></span>
-package</p>
+null or package</p>
 
 <p><span class="emphasis"><em>Default:</em></span>
 <code class="literal">pkgs.tmux</code></p>