diff --git a/src/ToDo.txt b/src/ToDo.txt
index 32d7f386..2973cfee 100644
--- a/src/ToDo.txt
+++ b/src/ToDo.txt
@@ -92,6 +92,7 @@ short term:
   **DONE** 08-09-01
 
 * PFitter.cpp: implement HESSE
+  **DONE** 08-09-01
 
 * implement FFT with msr-interface
 
diff --git a/src/classes/PFitter.cpp b/src/classes/PFitter.cpp
index a931ed5a..9f4131f0 100644
--- a/src/classes/PFitter.cpp
+++ b/src/classes/PFitter.cpp
@@ -36,6 +36,7 @@ using namespace std;
 #include <math.h>
 
 #include "Minuit2/FunctionMinimum.h"
+#include "Minuit2/MnHesse.h"
 #include "Minuit2/MnMinimize.h"
 #include "Minuit2/MnMigrad.h"
 #include "Minuit2/MnMinos.h"
@@ -311,6 +312,23 @@ bool PFitter::ExecuteHesse()
   if (fFcnMin)
     fMnUserParams = fFcnMin->UserParameters();
 
+  // create the hesse object
+  ROOT::Minuit2::MnHesse hesse;
+
+  // call hesse
+  ROOT::Minuit2::MnUserParameterState mnState = hesse((*fFitterFcn), fMnUserParams);
+
+  if (!mnState.IsValid()) {
+    cout << endl << "**WARNING** PFitter::ExecuteHesse(): Hesse encountered some problems!";
+    cout << endl;
+    return false;
+  }
+
+  // fill parabolic errors
+  for (unsigned int i=0; i<fParams.size(); i++) {
+    fRunInfo->SetMsrParamStep(i, mnState.Error(i));
+  }
+
   return true;
 }