diff --git a/tools/scripts/new_sequence.sh b/tools/scripts/new_sequence.sh
index d2f05d7..bf2a222 100644
--- a/tools/scripts/new_sequence.sh
+++ b/tools/scripts/new_sequence.sh
@@ -43,7 +43,7 @@ exec 3>&1
 cd $tribe
 existing_seq=$(ls -d */)
 nbr_seq=$(echo $existing_seq | wc -w)
-next_seq_number=$(expr $nbr_seq + 1)
+next_seq_number=$(expr $nbr_seq)
 
 title=$(dialog \
     --inputbox "Séquences trouvée\n${existing_seq/ /\n} \nNom de la nouvelle sequence (n°$next_seq_number)" \