diff --git a/man/systemd-nspawn.xml b/man/systemd-nspawn.xml
index bf299b0a4af..d241ca5c52c 100644
--- a/man/systemd-nspawn.xml
+++ b/man/systemd-nspawn.xml
@@ -525,9 +525,9 @@
         in the container's file system namespace.</para>
 
         <para>This is for containers which have several bootable directories in them; for example, several
-        <ulink url="https://ostree.readthedocs.io/en/latest/">OSTree</ulink> deployments. It emulates the
-        behavior of the boot loader and the initrd which normally select which directory to mount as the root
-        and start the container's PID 1 in.</para>
+        <citerefentry><refentrytitle>ostree</refentrytitle><manvolnum>1</manvolnum></citerefentry>
+        deployments. It emulates the behavior of the boot loader and the initrd which normally select which
+        directory to mount as the root and start the container's PID 1 in.</para>
 
         <xi:include href="version-info.xml" xpointer="v233"/></listitem>
       </varlistentry>