diff --git a/source/services.rst b/source/services.rst
index 49e4e9ef..70ea1178 100644
--- a/source/services.rst
+++ b/source/services.rst
@@ -49,3 +49,4 @@ Your security appliance comes with quite some services to ease network operation
    manual/ips
    manual/logging_services
    manual/monit
+   manual/ntpd