diff --git a/Functions.py b/Functions.py
index be2508f44be10050649d9a6fb74da851d13e05eb..18386a2370865eb72fd909a4cbf7c255f99054e5 100644
--- a/Functions.py
+++ b/Functions.py
@@ -203,7 +203,7 @@ def get_segments_sequence_and_paths(gfa):
             paths[line[3]]=list_path
     return [paths,seg_seq]
 
-def get_first_seg(list_seg):
+def get_first_seg(list_seg): # get the first segment of the list that is in the target genome
     first_seg_found=''
     for segment in list_seg:
         if segment[1:] in segments_on_target_genome: