diff --git a/msc/osmo-msc.cfg b/msc/osmo-msc.cfg
index 3f9e192..ddac4cd 100644
--- a/msc/osmo-msc.cfg
+++ b/msc/osmo-msc.cfg
@@ -73,6 +73,7 @@
  cs7-instance-iu 0
  mgw remote-ip 127.0.0.1
  emergency-call route-to-msisdn 112
+ mncc external /tmp/mncc.sock
 mncc-int
  default-codec tch-f fr
  default-codec tch-h hr