diff --git a/man/systemd-timesyncd.service.xml b/man/systemd-timesyncd.service.xml
index 47e243c27..f4ebccd4a 100644
--- a/man/systemd-timesyncd.service.xml
+++ b/man/systemd-timesyncd.service.xml
@@ -76,6 +76,21 @@
                 for more details.</para>
         </refsect1>
 
+        <refsect1>
+                <title>Files</title>
+
+                <variablelist>
+                        <varlistentry>
+                                <term><filename>/var/lib/systemd/clock</filename></term>
+
+                                <listitem>
+                                        <para>This file contains the timestamp of last
+                                        successful synchronization.</para>
+                                </listitem>
+                        </varlistentry>
+                </variablelist>
+        </refsect1>
+
         <refsect1>
                 <title>See Also</title>
                 <para>