diff --git a/addons/stock/models/stock_quant.py b/addons/stock/models/stock_quant.py
index d3c99edf288..a8fe2815557 100644
--- a/addons/stock/models/stock_quant.py
+++ b/addons/stock/models/stock_quant.py
@@ -480,7 +480,7 @@ class QuantPackage(models.Model):
         return action
 
     def _get_contained_quants(self):
-        return self.env['stock.quant'].search([('package_id', 'child_of', self.ids)])
+        return self.env['stock.quant'].search([('package_id', 'in', self.ids)])
 
     def _get_all_products_quantities(self):
         '''This function computes the different product quantities for the given package