diff --git a/runbot_merge/models/pull_requests.py b/runbot_merge/models/pull_requests.py
index ba8ac7f7..fe9ad9e6 100644
--- a/runbot_merge/models/pull_requests.py
+++ b/runbot_merge/models/pull_requests.py
@@ -1711,6 +1711,7 @@ class Commit(models.Model):
     statuses only, by PR pushes, by branch updates, ...
     """
     _name = _description = 'runbot_merge.commit'
+    _rec_name = 'sha'
 
     sha = fields.Char(required=True)
     statuses = fields.Char(help="json-encoded mapping of status contexts to states", default="{}")