diff --git a/man/sd_journal_print.xml b/man/sd_journal_print.xml
index 68a4a0a5c0e..f7a70e9b0f8 100644
--- a/man/sd_journal_print.xml
+++ b/man/sd_journal_print.xml
@@ -218,6 +218,9 @@ sd_journal_send("MESSAGE=Hello World, this is PID %lu!", (unsigned long) getpid(
     <function>sd_journal_send()</function>. Using
     <function>syslog()</function> has the benefit of being
     more portable.</para>
+
+    <para>These functions implement a client to the <ulink
+    url="https://systemd.io/JOURNAL_NATIVE_PROTOCOL">Native Journal Protocol</ulink>.</para>
   </refsect1>
 
   <refsect1>
diff --git a/man/systemd-journald.service.xml b/man/systemd-journald.service.xml
index 35cfbde86c8..875393b4081 100644
--- a/man/systemd-journald.service.xml
+++ b/man/systemd-journald.service.xml
@@ -53,9 +53,10 @@
       project='man-pages'><refentrytitle>syslog</refentrytitle><manvolnum>3</manvolnum></citerefentry>
       call</para></listitem>
 
-      <listitem><para>Structured system log messages via the native
-      Journal API, see
-      <citerefentry><refentrytitle>sd_journal_print</refentrytitle><manvolnum>3</manvolnum></citerefentry></para></listitem>
+      <listitem><para>Structured system log messages via the native Journal API, see
+      <citerefentry><refentrytitle>sd_journal_print</refentrytitle><manvolnum>3</manvolnum></citerefentry>
+      and <ulink url="https://systemd.io/JOURNAL_NATIVE_PROTOCOL">Native Journal
+      Protocol</ulink></para></listitem>
 
       <listitem><para>Standard output and standard error of service units. For further details see
       below.</para></listitem>