diff --git a/openbsc/doc/examples/osmo-nitb/nanobts/openbsc-multitrx.cfg b/openbsc/doc/examples/osmo-nitb/nanobts/openbsc-multitrx.cfg
index 7a187f8..bea0b7d 100644
--- a/openbsc/doc/examples/osmo-nitb/nanobts/openbsc-multitrx.cfg
+++ b/openbsc/doc/examples/osmo-nitb/nanobts/openbsc-multitrx.cfg
@@ -30,7 +30,7 @@
  timer t3103 0
  timer t3105 0
  timer t3107 0
- timer t3109 0
+ timer t3109 4
  timer t3111 0
  timer t3113 60
  timer t3115 0