diff --git a/benchmarks/barrel_ecal/scripts/emcal_barrel_pions_analysis.cxx b/benchmarks/barrel_ecal/scripts/emcal_barrel_pions_analysis.cxx
index a49ca514072454b4d6ccc1fd6c960276cc786966..62d5e0b805d6843b2602039cda14b906139e170e 100644
--- a/benchmarks/barrel_ecal/scripts/emcal_barrel_pions_analysis.cxx
+++ b/benchmarks/barrel_ecal/scripts/emcal_barrel_pions_analysis.cxx
@@ -126,7 +126,7 @@ void emcal_barrel_pions_analysis(const char* input_fname = "sim_output/sim_emcal
               .Define("pid",    getpid,     {"mcparticles"})
               ;
   // Set sampling Fraction, ideally this will be taken from a json file 
-  auto svec = d1.Mean<double>("fsam");
+  auto svec = d1.Mean("fsam");
   for (auto &ele : svec){cout << ele << endl;}
 
   auto d2 = d1.Define("dE",     eResol,     {"Esim","Ethr"})