diff --git a/benchmarks/benchmark-descriptors/benchmarker.sh b/benchmarks/benchmark-descriptors/benchmarker.sh
index 2f8ef72..b7be76e 100644
--- a/benchmarks/benchmark-descriptors/benchmarker.sh
+++ b/benchmarks/benchmark-descriptors/benchmarker.sh
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 # Check if the correct number of arguments is provided
-if [ "$#" -ne 3 ]; then
+if [ "$#" -ne 4 ]; then
     echo "Usage: $0 <program_location> <descriptor-directory> <output-directory> <file-extender>"
     exit 1
 fi
@@ -23,8 +23,9 @@ for json_file in "$json_directory"/*.json; do
     # Check if there are matching files
     if [ -e "$json_file" ]; then
         # Execute the program with the JSON file as parameters
-        name="${filename%.*}"
+	bn=$(basename $json_file)
+	name="${bn%.*}"
         echo "running test ${name} ..."
-        "$program_location" "$json_file" "${output-directory}/${name}${file_extender}.json"
+        "$program_location" "$json_file" "${output_dir}/${name}${file_extender}.json"
     fi
 done