diff --git a/k4Reco/DDPlanarDigi/components/DDPlanarDigi.cpp b/k4Reco/DDPlanarDigi/components/DDPlanarDigi.cpp
index 639fcfd..5afab0b 100644
--- a/k4Reco/DDPlanarDigi/components/DDPlanarDigi.cpp
+++ b/k4Reco/DDPlanarDigi/components/DDPlanarDigi.cpp
@@ -101,7 +101,7 @@ std::tuple<edm4hep::TrackerHitPlaneCollection, edm4hep::TrackerHitSimTrackerHitL
   auto thsthcol  = edm4hep::TrackerHitSimTrackerHitLinkCollection();
 
   std::string cellIDEncodingString = m_geoSvc->constantAsString(m_encodingStringVariable.value());
-  dd4hep::DDSegmentation::BitFieldCoder bitFieldCoder("system:4,layer:4,ring:2,module:8,sensor:2,x:32:-12,y:-12");
+  dd4hep::DDSegmentation::BitFieldCoder bitFieldCoder(cellIDEncodingString);
 
   int nSimHits = simTrackerHits.size();
   debug() << "Processing collection " << m_collName << " with " << simTrackerHits.size() << " hits ... " << endmsg;