diff --git a/website_sale_product_minimal_price/__manifest__.py b/website_sale_product_minimal_price/__manifest__.py
index e8375ea80c..32832eb328 100644
--- a/website_sale_product_minimal_price/__manifest__.py
+++ b/website_sale_product_minimal_price/__manifest__.py
@@ -3,7 +3,7 @@
 {
     "name": "Website Sale Product Minimal Price",
     "summary": "Display minimal price for products that has variants",
-    "version": "19.0.1.1.0",
+    "version": "19.0.1.1.1",
     "development_status": "Production/Stable",
     "maintainers": ["sergio-teruel"],
     "category": "Website",
diff --git a/website_sale_product_minimal_price/models/product_template.py b/website_sale_product_minimal_price/models/product_template.py
index 385d6a4d8d..f3df60411f 100644
--- a/website_sale_product_minimal_price/models/product_template.py
+++ b/website_sale_product_minimal_price/models/product_template.py
@@ -13,7 +13,13 @@ class ProductTemplate(models.Model):
     def _get_website_current_pricelist(self, website=None):
         website = website or self.env["website"].get_current_website()
         if request and getattr(request, "pricelist", False):
-            return request.pricelist
+            # In Odoo 19 request.pricelist is a lazy() proxy
+            # (website_sale/models/ir_http.py). Returning it as-is makes the
+            # in-place union in _get_pricelist_variant_items
+            # ("visited_pricelists |= pricelist") delegate to
+            # product.pricelist.__ior__, which no longer exists on recordsets,
+            # raising AttributeError. Materialise it into a real recordset.
+            return self.env["product.pricelist"].browse(request.pricelist.ids)
         pricelist = website._get_and_cache_current_pricelist()
         if pricelist:
             return pricelist
diff --git a/website_sale_product_minimal_price/readme/CONTRIBUTORS.md b/website_sale_product_minimal_price/readme/CONTRIBUTORS.md
index 4bf8e26a92..a02741d868 100644
--- a/website_sale_product_minimal_price/readme/CONTRIBUTORS.md
+++ b/website_sale_product_minimal_price/readme/CONTRIBUTORS.md
@@ -9,3 +9,7 @@
 - [Studio73](https://www.studio73.es):
 
     - Alex Garcia
+
+- [Akyado](https://www.akyado.com):
+
+    - Antoine Guex
diff --git a/website_sale_product_minimal_price/readme/HISTORY.md b/website_sale_product_minimal_price/readme/HISTORY.md
new file mode 100644
index 0000000000..0cd86b42b8
--- /dev/null
+++ b/website_sale_product_minimal_price/readme/HISTORY.md
@@ -0,0 +1,11 @@
+## 19.0.1.1.1 (2026-08-03)
+
+### Bugfixes
+
+- Fix `AttributeError: 'product.pricelist' object has no attribute '__ior__'`
+  raised on the shop page for multi-variant products whose pricelist has
+  sub-pricelists (`compute_price = formula`, `base_pricelist_id` set). In
+  Odoo 19 `request.pricelist` is a `lazy()` proxy, so the in-place union
+  `visited_pricelists |= pricelist` in `_get_pricelist_variant_items` delegated
+  to the now-removed `product.pricelist.__ior__`.
+  `_get_website_current_pricelist` now returns a materialised recordset.
diff --git a/website_sale_product_minimal_price/tests/test_product_template.py b/website_sale_product_minimal_price/tests/test_product_template.py
index 4572a8c1eb..d5d2128e8b 100644
--- a/website_sale_product_minimal_price/tests/test_product_template.py
+++ b/website_sale_product_minimal_price/tests/test_product_template.py
@@ -1,7 +1,8 @@
-from unittest.mock import MagicMock, patch
+from unittest.mock import patch
 
 from odoo.http import request
 from odoo.tests import TransactionCase, tagged
+from odoo.tools import lazy
 
 
 @tagged("post_install", "-at_install")
@@ -48,10 +49,20 @@ def setUpClass(cls):
     def test_get_website_current_pricelist(self):
         from odoo.addons.website_sale.tests.common import MockRequest
 
+        pricelist = self.env["product.pricelist"].create({"name": "Request Pricelist"})
         with MockRequest(self.env, website=self.website):
-            request.pricelist = MagicMock()
+            # In Odoo 19 ``request.pricelist`` is a ``lazy()`` proxy. The method
+            # must return a materialised recordset, otherwise the in-place union
+            # in ``_get_pricelist_variant_items`` ("visited_pricelists |= ...")
+            # raises ``AttributeError: 'product.pricelist' object has no
+            # attribute '__ior__'``.
+            request.pricelist = lazy(lambda: pricelist)
             res = self.product_tmpl._get_website_current_pricelist()
-            self.assertEqual(res, request.pricelist)
+            self.assertEqual(res, pricelist)
+            # Regression: the result must support in-place set operations.
+            accumulator = self.env["product.pricelist"]
+            accumulator |= res
+            self.assertEqual(accumulator, pricelist)
         with patch.object(
             type(self.website), "_get_and_cache_current_pricelist"
         ) as mock_get_cache: