diff --git a/runbot/models/team.py b/runbot/models/team.py
index 43ca47ce..bebf708c 100644
--- a/runbot/models/team.py
+++ b/runbot/models/team.py
@@ -79,7 +79,11 @@ class RunbotTeam(models.Model):
 
     def _get_members_logins(self):
         self.ensure_one()
-        return set((self.github_logins or '').split(',')) | set(self.user_ids.filtered(lambda user: user.github_login).mapped('github_login'))
+        team_loggins = set()
+        if self.github_logins:
+            team_loggins = set(self.github_logins.split(','))
+        team_loggins |= set(self.user_ids.filtered(lambda user: user.github_login).mapped('github_login'))
+        return team_loggins
 
     def _fetch_members(self):
         for team in self: