diff --git a/contract_variable_quantity/models/contract.py b/contract_variable_quantity/models/contract.py
index 1d25df93..dff047a4 100644
--- a/contract_variable_quantity/models/contract.py
+++ b/contract_variable_quantity/models/contract.py
@@ -45,8 +45,8 @@ class AccountAnalyticAccount(models.Model):
         return vals
 
 
-class AccountAnalyticInvoiceLine(models.Model):
-    _inherit = 'account.analytic.invoice.line'
+class AccountAnalyticContractLine(models.Model):
+    _inherit = 'account.analytic.contract.line'
 
     qty_type = fields.Selection(
         selection=[