diff --git a/km3io/tools.py b/km3io/tools.py
index 0536391f069c47bcbe1b1d217a7e72e7e31e337c..269033e6f8b9dd0e1e09ad76ff9a0f23cad1ef7c 100644
--- a/km3io/tools.py
+++ b/km3io/tools.py
@@ -236,7 +236,7 @@ def best_track(tracks,
         the maximum range of rec_stages.
     stages : list or set, optional
         either a list or a set of stages:
-        - if stages is a list, the order of the rec_stages is conserved.
+        - list: the order of the rec_stages is conserved.
         - if stages in a set, the order is irrelevant.
 
     Returns