diff --git a/illumina.py b/illumina.py
index 3f03949e..711dc23f 100755
--- a/illumina.py
+++ b/illumina.py
@@ -261,7 +261,7 @@ def main_illumina_demux(args):
         # organize samplesheet metadata as json
         if args.out_meta_by_sample:
             with open(args.out_meta_by_sample, 'wt') as outf:
-                json.dump(dict((r['sample_original'],r) for r in samples.get_rows()), outf, indent=2)
+                json.dump(dict((r['sample'],r) for r in samples.get_rows()), outf, indent=2)
         if args.out_meta_by_filename:
             with open(args.out_meta_by_filename, 'wt') as outf:
                 json.dump(dict((r['run'],r) for r in samples.get_rows()), outf, indent=2)