diff --git a/doc/examples/osmo-sgsn/osmo-sgsn.cfg b/doc/examples/osmo-sgsn/osmo-sgsn.cfg
index 9703c23..06f035f 100644
--- a/doc/examples/osmo-sgsn/osmo-sgsn.cfg
+++ b/doc/examples/osmo-sgsn/osmo-sgsn.cfg
@@ -11,7 +11,7 @@
  ggsn 0 gtp-version 1
  auth-policy remote
  gsup remote-ip 127.0.0.1
- gsup remote-port 2222
+ gsup remote-port 4222
 !
 ns
  timer tns-block 3