diff --git a/data/apps/cvtt_musvc_sim.cfg b/data/apps/cvtt_musvc_sim.cfg
index cd51b45..e0ed5bf 100644
--- a/data/apps/cvtt_musvc_sim.cfg
+++ b/data/apps/cvtt_musvc_sim.cfg
@@ -126,7 +126,7 @@
                 , "prune": {
                     "max_days": 7
                 }
-                , ""
+                , "threshold_recording_lag_sec": 15
                 , "instrument_timeout_sec": 119
                 , "instruments": [
                     {