diff --git a/ttcn3-bsc-test/osmo-bsc.cfg b/ttcn3-bsc-test/osmo-bsc.cfg
index 21ef4b9b..26d062e0 100644
--- a/ttcn3-bsc-test/osmo-bsc.cfg
+++ b/ttcn3-bsc-test/osmo-bsc.cfg
@@ -8,6 +8,7 @@ log file /data/osmo-bsc.log
  logging color 0
  logging print category 1
  logging timestamp 1
+ logging print extended-timestamp 1
  logging level all everything
  logging level rll notice
  logging level cc notice