diff --git a/report/scop_contribution_report.py b/report/scop_contribution_report.py
index 544325aa8d76786d40e78ef78be839825458ce9c..a7797b8daee2701373dbd2c1d6df199b9798fb72 100644
--- a/report/scop_contribution_report.py
+++ b/report/scop_contribution_report.py
@@ -178,7 +178,7 @@ class ScopContributionReport(models.Model):
             } if not p.invoice_id else {
                 'date': p.date,
                 'name': p.name,
-                'ref': 'Avoir',
+                'ref': '',
                 'credit': p.credit,
                 'class': 'text-danger'
             })