diff --git a/src/classes/PRunAsymmetry.cpp b/src/classes/PRunAsymmetry.cpp
index 75585b1e0..39687df14 100644
--- a/src/classes/PRunAsymmetry.cpp
+++ b/src/classes/PRunAsymmetry.cpp
@@ -712,11 +712,20 @@ Bool_t PRunAsymmetry::PrepareData()
     forward[i].resize(runData->GetDataBin(forwardHistoNo[i])->size());
     forward[i]  = *runData->GetDataBin(forwardHistoNo[i]);
   }
+  // check if a dead time correction has to be done
+  // this will be done automatically in the function itself, which also
+  // checks in the global and run section
+  DeadTimeCorrection(forward, forwardHistoNo);
+
   backward.resize(backwardHistoNo.size()); // resize to number of groups
   for (UInt_t i=0; i<backwardHistoNo.size(); i++) {
     backward[i].resize(runData->GetDataBin(backwardHistoNo[i])->size());
     backward[i] = *runData->GetDataBin(backwardHistoNo[i]);
   }
+  // check if a dead time correction has to be done
+  // this will be done automatically in the function itself, which also
+  // checks in the global and run section
+  DeadTimeCorrection(backward, backwardHistoNo);
 
   // check if addrun's are present, and if yes add data
   // check if there are runs to be added to the current one