diff --git a/src/osmo_gsm_tester/templates/osmo-bsc.cfg.tmpl b/src/osmo_gsm_tester/templates/osmo-bsc.cfg.tmpl
index 53e683b..572e765 100644
--- a/src/osmo_gsm_tester/templates/osmo-bsc.cfg.tmpl
+++ b/src/osmo_gsm_tester/templates/osmo-bsc.cfg.tmpl
@@ -118,5 +118,6 @@
  amr-config 5_90k allowed
  amr-config 5_15k forbidden
  amr-config 4_75k forbidden
+ osmux ${bsc.use_osmux}
  msc-addr msc_remote
  bsc-addr bsc_local
diff --git a/src/osmo_gsm_tester/templates/osmo-mgw.cfg.tmpl b/src/osmo_gsm_tester/templates/osmo-mgw.cfg.tmpl
index 9e338e1..f91ab30 100644
--- a/src/osmo_gsm_tester/templates/osmo-mgw.cfg.tmpl
+++ b/src/osmo_gsm_tester/templates/osmo-mgw.cfg.tmpl
@@ -14,3 +14,4 @@
  number endpoints 31
  rtcp-omit
  rtp-accept-all 1
+ osmux ${mgw.use_osmux}
diff --git a/src/osmo_gsm_tester/templates/osmo-msc.cfg.tmpl b/src/osmo_gsm_tester/templates/osmo-msc.cfg.tmpl
index b370d5e..31c57d3 100644
--- a/src/osmo_gsm_tester/templates/osmo-msc.cfg.tmpl
+++ b/src/osmo_gsm_tester/templates/osmo-msc.cfg.tmpl
@@ -28,6 +28,7 @@
  mgw local-ip ${msc.ip_address.addr}
  mgw endpoint-range 1 31
  mgw bts-base 8000
+ osmux ${msc.use_osmux}
  assign-tmsi
  cs7-instance-iu 0
  cs7-instance-a 0