diff --git a/core/detectors/trd/CbmTrdParModGas.cxx b/core/detectors/trd/CbmTrdParModGas.cxx
index 61e97f6f2a515999a5d887d09d502752f076b976..511691a2d8be9d37ae2da16227ec912e642066af 100644
--- a/core/detectors/trd/CbmTrdParModGas.cxx
+++ b/core/detectors/trd/CbmTrdParModGas.cxx
@@ -48,7 +48,7 @@ CbmTrdParModGas::CbmTrdParModGas(const char* title)
   , fGasThick(0.6)
   , fPercentCO2(0.2)
   , fDriftMap(nullptr)
-  , fFileNamePID()
+  , fFileNamePID("parameters/trd/Likelihood_Xenon_85_v20b_tdr18_apr21.root")
 {
   TString s(title);
   TString name;