diff --git a/models/res_partner.py b/models/res_partner.py
index 6f0e165ee9c2185c40f9d522622778179d4662c1..2dae6dbb446b9c357e331f022adb70f6b6e4a97d 100644
--- a/models/res_partner.py
+++ b/models/res_partner.py
@@ -364,7 +364,7 @@ class ScopPartner(models.Model):
             raise ValidationError(
                 "Vous devez configurer un article et un journal d'adhésion !")
         else:
-            effectif = lm.eff_etp
+            effectif = lm.eff_tt
             amount_adhesion = self.get_amount_adhesion(effectif)
 
             Invoice = self.env['account.invoice']