diff --git a/service.md b/service.md
index 6fc8b3cd3258d151acb1a1f48e6f3f2cc6e17b25..0c2391b1a34b34c16ce2e35d8aa7fb2ad659c9a0 100644
--- a/service.md
+++ b/service.md
@@ -41,6 +41,7 @@ complete. This does not include undocumented services, below.
 [backup]: howto/backup
 [cache]: howto/cache
 [dns]: howto/dns
+[documentation]: service/documentation
 [drbd]: howto/drbd
 [ganeti]: howto/ganeti
 [grafana]: howto/grafana