diff --git a/options.html b/options.html
index 4986ed017..7e4bfd9cb 100644
--- a/options.html
+++ b/options.html
@@ -4116,7 +4116,7 @@ boolean</p><p><span class="emphasis"><em>Default:</em></span>
 </a></code></td></tr></table></dd><dt><span class="term"><a id="opt-programs.firefox.package"></a><a class="term" href="options.html#opt-programs.firefox.package"><code class="option">programs.firefox.package</code></a></span></dt><dd><p>The Firefox package to use. If state version ≥ 19.09 then
 this should be a wrapped Firefox package. For earlier state
 versions it should be an unwrapped Firefox package.
-Set to &lt;literal&gt;null&lt;/literal&gt; to disable installing Firefox.</p><p><span class="emphasis"><em>Type:</em></span>
+Set to <code class="literal">null</code> to disable installing Firefox.</p><p><span class="emphasis"><em>Type:</em></span>
 null or package</p><p><span class="emphasis"><em>Default:</em></span>
 <code class="literal">pkgs.firefox</code></p><p><span class="emphasis"><em>Example:</em></span></p><pre class="programlisting">pkgs.firefox.override {
   # See nixpkgs' firefox/wrapper.nix to check which options you can use