diff --git a/docs/formatdomain.html.in b/docs/formatdomain.html.in
index 3c4c656b47ddf82da7f382afe5e8c0ff6c07c2a0..6ffb0d2be7ef2e7b50edeb2e0b871f206a63cd92 100644
--- a/docs/formatdomain.html.in
+++ b/docs/formatdomain.html.in
@@ -1807,7 +1807,7 @@ qemu-kvm -net nic,model=? /dev/null
 
     <p>
       <code>target</code> can have a <code>port</code> attribute, which
-      specifies the port number. Ports are numbered starting from 1. There are
+      specifies the port number. Ports are numbered starting from 0. There are
       usually 0, 1 or 2 parallel ports.
     </p>
 
@@ -1825,7 +1825,7 @@ qemu-kvm -net nic,model=? /dev/null
 
     <p>
       <code>target</code> can have a <code>port</code> attribute, which
-      specifies the port number. Ports are numbered starting from 1. There are
+      specifies the port number. Ports are numbered starting from 0. There are
       usually 0, 1 or 2 serial ports.
     </p>