diff --git a/StRoot/StBFChain/BigFullChain.h b/StRoot/StBFChain/BigFullChain.h
index 1c8c2dda491..c91cf9a7d14 100644
--- a/StRoot/StBFChain/BigFullChain.h
+++ b/StRoot/StBFChain/BigFullChain.h
@@ -1795,7 +1795,7 @@ Bfc_st BFC[] = { // standard chains
 #endif
   {"dEdxY2"       ,"dEdxY2","","tpcDb,StEvent","StdEdxY2Maker","libMinuit,StdEdxY2Maker"
    ,                                                                 "Bichsel method used for dEdx",kFALSE},
-
+  {"CalcdNdx", "", "", "dEdxY2", "", "",              "Option for StdEdxY2Maker to calculate dN/dx",kFALSE},
   // Options in need to be done after the tracker
   // second wave of BTOF options needed after Sti
   {"btofMatch" ,"","","db,BTofUtil,vpdCalib,btofCalib","StBTofMatchMaker","StBTofMatchMaker"
diff --git a/StRoot/StBFChain/StBFChain.cxx b/StRoot/StBFChain/StBFChain.cxx
index ce5ea5f0eac..a09332d08a5 100644
--- a/StRoot/StBFChain/StBFChain.cxx
+++ b/StRoot/StBFChain/StBFChain.cxx
@@ -793,6 +793,9 @@ Int_t StBFChain::Instantiate()
       mk->SetAttr("EmbeddingShortCut", kTRUE);
       mk->PrintAttr();
     }
+    if (maker == "StdEdxY2Maker" && !GetOption("CalcdNdx")) {
+      mk->SetAttr("SkipdNdx", kTRUE);
+    }
     if (maker == "StSvtDbMaker" || maker == "StSsdDbMaker"){
       mk->SetMode(0);
       // If simulation running make sure pick up simu stuff from db
diff --git a/StRoot/StdEdxY2Maker/StdEdxY2Maker.cxx b/StRoot/StdEdxY2Maker/StdEdxY2Maker.cxx
index bc450e05d77..c8d6f37097d 100644
--- a/StRoot/StdEdxY2Maker/StdEdxY2Maker.cxx
+++ b/StRoot/StdEdxY2Maker/StdEdxY2Maker.cxx
@@ -169,8 +169,11 @@ Int_t StdEdxY2Maker::InitRun(Int_t RunNumber){
 
   if (! DoOnce) {
     DoOnce = 1;
-    if ((GetDate() > 20171201 && m_TpcdEdxCorrection->IsFixedTarget()) ||
-	(GetDate() > 20181201)) fUsedNdx = kTRUE; // use dN/dx for fixed target for Run XVIII and year >= XIX
+    if (! IAttr("SkipdNdx")) {
+      if ((GetDate() > 20171201 && m_TpcdEdxCorrection->IsFixedTarget()) ||
+	  (GetDate() > 20181201)
+	  ) fUsedNdx = kTRUE; // use dN/dx for fixed target for Run XVIII and year >= XIX
+    }
     if (TESTBIT(m_Mode, kCalibration)) {// calibration mode
       if (Debug()) LOG_WARN << "StdEdxY2Maker::InitRun Calibration Mode is On (make calibration histograms)" << endm;
       TFile *f = GetTFile();