diff --git a/doc/manuals/osmohlr-usermanual.adoc b/doc/manuals/osmohlr-usermanual.adoc
index 2369155..043c971 100644
--- a/doc/manuals/osmohlr-usermanual.adoc
+++ b/doc/manuals/osmohlr-usermanual.adoc
@@ -22,6 +22,8 @@
 
 include::../common/chapters/control_if.adoc[]
 
+include::../common/chapters/gsup.adoc[]
+
 include::../common/chapters/port_numbers.adoc[]
 
 include::../common/chapters/bibliography.adoc[]