diff --git a/pyrodigal/cli.py b/pyrodigal/cli.py
index 9fca8df..ecdc3c0 100644
--- a/pyrodigal/cli.py
+++ b/pyrodigal/cli.py
@@ -296,21 +296,21 @@ def main(
 
             # process sequence in parallel if possible
             process = functools.partial(_process, gene_finder)
-            for seq, preds in parallel_map(process, sequences):
+            for seq_id, preds in parallel_map(process, sequences):
                 # write output in GFF or GBK format
                 if args.f == "gff":
-                    preds.write_gff(out_file, seq.id)
+                    preds.write_gff(out_file, seq_id)
                 elif args.f == "gbk":
-                    preds.write_genbank(out_file, seq.id)
+                    preds.write_genbank(out_file, seq_id)
                 # if asked, write nucleotide sequences of genes
                 if nuc_file is not None:
-                    preds.write_genes(nuc_file, seq.id)
+                    preds.write_genes(nuc_file, seq_id)
                 # if asked, write amino acid sequences of proteins
                 if prot_file is not None:
-                    preds.write_translations(prot_file, seq.id, include_stop=args.no_stop_codon)
+                    preds.write_translations(prot_file, seq_id, include_stop=args.no_stop_codon)
                 # if asked, write scores
                 if scores_file is not None:
-                    preds.write_scores(scores_file, seq.id)
+                    preds.write_scores(scores_file, seq_id)
 
         except Exception as err:
             print("Error: {}".format(err))