diff --git a/reco/steer/CbmOnlineParWrite.cxx b/reco/steer/CbmOnlineParWrite.cxx
index e41dcc9d0fef17cc031f60c4b8cb2b33a833c4c5..8cba04a714e38cfff14ef98690582991fc8ef29c 100644
--- a/reco/steer/CbmOnlineParWrite.cxx
+++ b/reco/steer/CbmOnlineParWrite.cxx
@@ -283,7 +283,7 @@ void CbmOnlineParWrite::AddSts()
     sensorParSet->SetParSensor(addr08, sensor12cm);
     sensorParSet->SetParSensor(addr09, sensor6cm);
     sensorParSet->SetParSensor(addr10, sensor6cm);
-    sensorParSet->SetParSensor(addr11, sensor6cm);
+    sensorParSet->SetParSensor(addr11, sensor12cm);
     sensorParSet->SetParSensor(addr00, sensor6cm);
   }
   else {