diff --git a/addons/product/models/product_pricelist.py b/addons/product/models/product_pricelist.py
index dd023de06ce..91462e22e3f 100644
--- a/addons/product/models/product_pricelist.py
+++ b/addons/product/models/product_pricelist.py
@@ -109,6 +109,7 @@ class Pricelist(models.Model):
         self.ensure_one()
         if not date:
             date = self._context.get('date') or fields.Date.context_today(self)
+        date = fields.Date.to_date(date)  # handwritten query below does not work with non-dates (e.g. datetimes)
         if not uom_id and self._context.get('uom'):
             uom_id = self._context['uom']
         if uom_id: