diff --git a/data/vtlib/final_output_prep.json b/data/vtlib/final_output_prep.json
index 9e2681327..a65aeca60 100644
--- a/data/vtlib/final_output_prep.json
+++ b/data/vtlib/final_output_prep.json
@@ -265,7 +265,7 @@
 				"samtools":"markdup_samtools.json",
 				"picard":"markdup_picard.json",
 				"biobambam":"markdup_biobambam.json",
-				"duplexseq":"markdup_duplexseq.json"
+				"duplexseq":"markdup_duplexseq.json",
 				"none":"markdup_none.json"
 			}
 		}