diff --git a/web_m2x_options/static/src/components/form.esm.js b/web_m2x_options/static/src/components/form.esm.js
index 5b49eff751c..35c4b5eff8b 100644
--- a/web_m2x_options/static/src/components/form.esm.js
+++ b/web_m2x_options/static/src/components/form.esm.js
@@ -1,4 +1,5 @@
 /** @odoo-module **/
+import { registry } from "@web/core/registry";
 import {
     Many2ManyTagsField,
     Many2ManyTagsFieldColorEditable,
@@ -378,3 +379,18 @@ patch(FormController.prototype, {
         }
     },
 });
+
+// O.W.L. v18+: schema is validated in dev mode on adding to registry
+patch(registry.category("fields").validationSchema, {
+    m2oOptionsPropsCreate: { type: Function, optional: true },
+    m2oOptionsPropsCreateEdit: { type: Function, optional: true },
+    m2oOptionsPropsLimit: { type: Function, optional: true },
+    m2oOptionsPropsSearchMore: { type: Function, optional: true },
+    m2oOptionsPropsOpen: { type: Function, optional: true },
+    m2oOptionsProps: { type: Function, optional: true },
+    m2mOptionsPropsCreate: { type: Function, optional: true },
+    m2mOptionsPropsCreateEdit: { type: Function, optional: true },
+    m2mOptionsPropsLimit: { type: Function, optional: true },
+    m2mOptionsPropsSearchMore: { type: Function, optional: true },
+    m2mOptionsProps: { type: Function, optional: true },
+});