diff --git a/src/classes/PRunListCollection.cpp b/src/classes/PRunListCollection.cpp
index e570a260..cf2652e6 100644
--- a/src/classes/PRunListCollection.cpp
+++ b/src/classes/PRunListCollection.cpp
@@ -151,7 +151,7 @@ Bool_t PRunListCollection::Add(Int_t runNo, EPMusrHandleTag tag)
         success = false;
       break;
     case PRUN_NON_MUSR:
-      fRunNonMusrList.push_back(new PRunNonMusr(fMsrInfo, fData, runNo, tag));
+      fRunNonMusrList.push_back(new PRunNonMusr(fMsrInfo, fData, runNo, tag, fTheoAsData));
       if (!fRunNonMusrList[fRunNonMusrList.size()-1]->IsValid())
         success = false;
       break;
diff --git a/src/classes/PRunNonMusr.cpp b/src/classes/PRunNonMusr.cpp
index 1e063c7e..f36ee553 100644
--- a/src/classes/PRunNonMusr.cpp
+++ b/src/classes/PRunNonMusr.cpp
@@ -60,7 +60,8 @@ PRunNonMusr::PRunNonMusr() : PRunBase()
  * \param runNo number of the run within the msr-file
  * \param tag tag showing what shall be done: kFit == fitting, kView == viewing
  */
-PRunNonMusr::PRunNonMusr(PMsrHandler *msrInfo, PRunDataHandler *rawData, UInt_t runNo, EPMusrHandleTag tag) : PRunBase(msrInfo, rawData, runNo, tag)
+PRunNonMusr::PRunNonMusr(PMsrHandler *msrInfo, PRunDataHandler *rawData, UInt_t runNo, EPMusrHandleTag tag, Bool_t theoAsData) :
+  PRunBase(msrInfo, rawData, runNo, tag), fTheoAsData(theoAsData)
 {
   // get the proper run
   fRawRunData = fRawData->GetRunData(*(fRunInfo->GetRunName()));
@@ -440,7 +441,7 @@ Bool_t PRunNonMusr::PrepareViewData()
 
   // typically take 1000 points to calculate the theory, except if there are more data points, than take that number
   Double_t xStep;
-  if (fData.GetX()->size() > 1000.0)
+  if ((fData.GetX()->size() > 1000.0) || fTheoAsData)
     xStep = (xMax-xMin)/fData.GetX()->size();
   else
     xStep = (xMax-xMin)/1000.0;
diff --git a/src/include/PRunNonMusr.h b/src/include/PRunNonMusr.h
index 77ad5730..a874b51d 100644
--- a/src/include/PRunNonMusr.h
+++ b/src/include/PRunNonMusr.h
@@ -40,7 +40,7 @@ class PRunNonMusr : public PRunBase
 {
   public:
     PRunNonMusr();
-    PRunNonMusr(PMsrHandler *msrInfo, PRunDataHandler *rawData, UInt_t runNo, EPMusrHandleTag tag);
+    PRunNonMusr(PMsrHandler *msrInfo, PRunDataHandler *rawData, UInt_t runNo, EPMusrHandleTag tag, Bool_t theoAsData);
     virtual ~PRunNonMusr();
 
     virtual Double_t CalcChiSquare(const std::vector<Double_t>& par);
@@ -65,6 +65,7 @@ class PRunNonMusr : public PRunBase
 
     UInt_t fNoOfFitBins;    ///< number of bins to be be fitted
     Int_t  fPacking;        ///< packing for this particular run. Either given in the RUN- or GLOBAL-block.
+    Bool_t fTheoAsData;     ///< true=only calculate the theory points at the data points, false=calculate more points for the theory as compared to data are calculated which lead to 'nicer' Fouriers
 
     Int_t fStartTimeBin;    ///< bin at which the fit starts
     Int_t fEndTimeBin;      ///< bin at which the fit ends