diff --git a/addons/web/static/src/core/datetime/datetime_hook.js b/addons/web/static/src/core/datetime/datetime_hook.js
index 50d58ad9e62..8230ef73c19 100644
--- a/addons/web/static/src/core/datetime/datetime_hook.js
+++ b/addons/web/static/src/core/datetime/datetime_hook.js
@@ -4,6 +4,9 @@ import { onPatched, onWillRender, useEffect, useRef } from "@odoo/owl";
 import { usePopover } from "@web/core/popover/popover_hook";
 import { useService } from "@web/core/utils/hooks";
 
+/**
+ * @param {import("./datetimepicker_service").DateTimePickerHookParams} hookParams
+ */
 export function useDateTimePicker(hookParams) {
     const datetimePicker = useService("datetime_picker");
     if (typeof hookParams.target === "string") {
diff --git a/addons/web/tooling/types/services.d.ts b/addons/web/tooling/types/services.d.ts
index 68cbb5dde4f..d594e420cc5 100644
--- a/addons/web/tooling/types/services.d.ts
+++ b/addons/web/tooling/types/services.d.ts
@@ -2,6 +2,7 @@ declare module "services" {
     import { actionService } from "@web/webclient/actions/action_service";
     import { commandService } from "@web/core/commands/command_service";
     import { companyService } from "@web/webclient/company_service";
+    import { datetimePickerService } from "@web/core/datetime/datetimepicker_service";
     import { dialogService } from "@web/core/dialog/dialog_service";
     import { effectService } from "@web/core/effects/effect_service";
     import { fieldService } from "@web/core/field_service";
@@ -23,6 +24,7 @@ declare module "services" {
         action: ReturnType<typeof actionService.start>;
         command: ReturnType<typeof commandService.start>;
         company: ReturnType<typeof companyService.start>;
+        datetime_picker: ReturnType<typeof datetimePickerService.start>;
         dialog: ReturnType<typeof dialogService.start>;
         effect: ReturnType<typeof effectService.start>;
         field: ReturnType<typeof fieldService.start>;