diff --git a/include/BM1DSave.hh b/include/BM1DSave.hh
index fd31976..39c9e24 100644
--- a/include/BM1DSave.hh
+++ b/include/BM1DSave.hh
@@ -21,7 +21,7 @@ class BM1DSave {
 public:
     BM1DSave();
     ~BM1DSave();
-    void SaveToTree(TMultiGraph *mg, Int_t p0, Int_t p1, Int_t nSteps, Int_t nRuns, Double_t x1, Double_t x2, Double_t mu1, Double_t mu2, Double_t sigma1, Double_t sigma2, std::vector<Double_t> t, std::vector<Double_t> x);
+    void SaveToTree(TMultiGraph *mg, Int_t p0, Int_t p1, Int_t nSteps, Int_t nRuns, Double_t x1, Double_t x2, Double_t mu1, Double_t mu2, Double_t sigma1, Double_t sigma2, std::vector<Double_t> t, std::vector<Double_t> x, const char* filename);
 private:
   TFile* fOut;
 
diff --git a/src/BM1DSave.cc b/src/BM1DSave.cc
index b1d21f4..d281c42 100644
--- a/src/BM1DSave.cc
+++ b/src/BM1DSave.cc
@@ -10,9 +10,9 @@ BM1DSave::~BM1DSave()
 }
 
 
-void BM1DSave::SaveToTree(TMultiGraph *mg, Int_t p0, Int_t p1, Int_t nSteps, Int_t nRuns, Double_t x1, Double_t x2, Double_t mu1, Double_t mu2, Double_t sigma1, Double_t sigma2, std::vector<Double_t> t, std::vector<Double_t> x)
+void BM1DSave::SaveToTree(TMultiGraph *mg, Int_t p0, Int_t p1, Int_t nSteps, Int_t nRuns, Double_t x1, Double_t x2, Double_t mu1, Double_t mu2, Double_t sigma1, Double_t sigma2, std::vector<Double_t> t, std::vector<Double_t> x, const char* filename)
 {
-  fOut = new TFile("result.root", "RECREATE");
+  fOut = new TFile(filename, "RECREATE");
   TTree *BM1DTree = new TTree("BM1DTree","BM1DTree");
   TTree *DataTree = new TTree("DataTree","DataTree");