diff --git a/options.xhtml b/options.xhtml
index 5bee62eed..b0f65d15d 100644
--- a/options.xhtml
+++ b/options.xhtml
@@ -72667,7 +72667,7 @@ string</p>
  </span>
 </dt>
 <dd>
-<p>Enable systemd socket activation.</p>
+<p>Enable systemd socket activation. This is only supported on Linux.</p>
 
 <p><span class="emphasis"><em>Type:</em></span>
 boolean</p>