diff --git a/benchmarks/clustering/full_cal_clusters.sh b/benchmarks/clustering/full_cal_clusters.sh
index 24dabd4cf1166588e25d83bed72816d2edfed094..27003fd137377e020b8ed47e0aba95f371337701 100755
--- a/benchmarks/clustering/full_cal_clusters.sh
+++ b/benchmarks/clustering/full_cal_clusters.sh
@@ -12,6 +12,7 @@ function print_the_help {
   echo "    -n,--nevents     Number of events"
   echo "    -t,--nametag     name tag"
   echo "    -p,--particle    particle type"
+  echo "    -o,--outputdir   output directory for reco,gen, and hepmc files"
   echo "    --pmin           minimum particle momentum (GeV)"
   echo "    --pmax           maximum particle momentum (GeV)"
   echo "                     allowed types: pion0, pion+, pion-, kaon0, kaon+, kaon-, proton, neutron, electron, positron, photon"
@@ -38,6 +39,11 @@ do
       shift # past argument
       shift # past value
       ;;
+    -o|--outputdir)
+      outputdir="$2"
+      shift # past argument
+      shift # past value
+      ;;
     -n|--nevents)
       export JUGGLER_N_EVENTS="$2"
       shift # past argument