doc: Document babeld.
diff --git a/doc/quagga.texi b/doc/quagga.texi
index ff8002c..ff913aa 100644
--- a/doc/quagga.texi
+++ b/doc/quagga.texi
@@ -86,6 +86,7 @@
 * RIPng::
 * OSPFv2::
 * OSPFv3::
+* Babel::
 * BGP::
 * Configuring Quagga as a Route Server::
 * VTY shell::
@@ -110,6 +111,7 @@
 @include ripngd.texi
 @include ospfd.texi
 @include ospf6d.texi
+@include babeld.texi
 @include bgpd.texi
 @include routeserver.texi
 @include vtysh.texi