diff --git a/parsers/survex.py b/parsers/survex.py
index 39d42dc..d5ed15f 100644
--- a/parsers/survex.py
+++ b/parsers/survex.py
@@ -216,6 +216,8 @@ class LoadingSurvex():
         you will see than have the team members are recognised by this parser, but not recognised by the
         wider troggle system (the name is not a hyperlink) - apparently randomly. 
         GetPersonExpeditionNameLookup() needs to be fixed.
+        
+        personrole is used to record that a person was on a trip, NOT the role they played.
         """
         teammembers = [ ]
         mteammember = self.rx_teammem.match(line)