diff --git a/benchmarks/dis/analysis/truth_reconstruction.py b/benchmarks/dis/analysis/truth_reconstruction.py
index 8ef021b45571fcf4403b07a8e7a11d936c8e267c..5bb8f5ca3b091ba42473746b89efe4abccc6065c 100644
--- a/benchmarks/dis/analysis/truth_reconstruction.py
+++ b/benchmarks/dis/analysis/truth_reconstruction.py
@@ -18,7 +18,7 @@ kwargs = vars(args)
 rec_file = args.rec_file
 Nevents = int(args.nevents)
 r_path = args.results_path + '/truth_reconstruction/' #Path for output figures and file.
-Dconfig = 'epic' + config.split('_epic')[1].strip() #Detector config
+Dconfig = 'epic' + args.config.split('_epic')[1].strip() #Detector config
 config = args.config.split('_epic')[0].strip()
 
 for array in ur.iterate(rec_file + ':events',['MCParticles/MCParticles.generatorStatus',