diff --git a/addons/web/static/src/core/dialog/dialog.js b/addons/web/static/src/core/dialog/dialog.js
index 5da7dbd4b3b..23c256e7401 100644
--- a/addons/web/static/src/core/dialog/dialog.js
+++ b/addons/web/static/src/core/dialog/dialog.js
@@ -40,7 +40,7 @@ export class Dialog extends Component {
             this.data.close();
         });
         this.id = `dialog_${this.data.id}`;
-        useChildSubEnv({ inDialog: true, dialogId: this.id, closeDialog: this.data.close });
+        useChildSubEnv({ inDialog: true, dialogId: this.id, closeDialog: () => this.data.close() });
         this.position = useState({ left: 0, top: 0 });
         useDialogDraggable({
             ref: this.modalRef,
diff --git a/addons/web/static/src/core/dialog/dialog.xml b/addons/web/static/src/core/dialog/dialog.xml
index ae8bead3d41..d58da7bd02c 100644
--- a/addons/web/static/src/core/dialog/dialog.xml
+++ b/addons/web/static/src/core/dialog/dialog.xml
@@ -13,7 +13,7 @@
                         <header t-if="props.header" class="modal-header">
                             <t t-slot="header" close="data.close" isFullscreen="isFullscreen">
                                 <t t-call="web.Dialog.header">
-                                    <t t-set="close" t-value="data.close"/>
+                                    <t t-set="close" t-value="() => this.data.close()"/>
                                     <t t-set="fullscreen" t-value="isFullscreen"/>
                                 </t>
                             </t>
@@ -21,14 +21,14 @@
                         <!-- FIXME: WOWL there is a bug on t-portal on owl, in which t-portal don't work on multinode.
                         To avoid this we place the footer before the body -->
                         <footer t-if="props.footer" class="modal-footer justify-content-around justify-content-sm-start flex-wrap gap-1" style="order:2">
-                            <t t-slot="footer" close="data.close">
-                                <button class="btn btn-primary o-default-button" t-on-click="data.close">
+                            <t t-slot="footer" close="() => this.data.close()">
+                                <button class="btn btn-primary o-default-button" t-on-click="() => this.data.close()">
                                     <t>Ok</t>
                                 </button>
                             </t>
                         </footer>
                         <main class="modal-body" t-attf-class="{{ props.bodyClass }} {{ !props.withBodyPadding ? 'p-0': '' }}">
-                            <t t-slot="default" close="data.close" />
+                            <t t-slot="default" close="() => this.data.close()" />
                         </main>
                     </div>
                 </div>
diff --git a/addons/web/static/src/webclient/actions/action_dialog.xml b/addons/web/static/src/webclient/actions/action_dialog.xml
index 34bee4de194..5d4eb045b8a 100644
--- a/addons/web/static/src/webclient/actions/action_dialog.xml
+++ b/addons/web/static/src/webclient/actions/action_dialog.xml
@@ -17,7 +17,7 @@
     </xpath>
     <xpath expr="//t[@t-slot='header']" position="replace">
       <t t-call="web.ActionDialog.header">
-        <t t-set="close" t-value="props.close"/>
+        <t t-set="close" t-value="() => this.data.close()"/>
         <t t-set="fullscreen" t-value="props.isFullscreen"/>
       </t>
     </xpath>
@@ -27,7 +27,7 @@
     <xpath expr="//t[@t-slot='footer']" position="replace">
       <t t-if="!isLegacy">
         <t t-slot="buttons">
-          <button class="btn btn-primary o-default-button" t-on-click="data.close">Ok</button>
+          <button class="btn btn-primary o-default-button" t-on-click="() => this.data.close()">Ok</button>
         </t>
       </t>
     </xpath>
diff --git a/addons/web/static/tests/core/dialog_tests.js b/addons/web/static/tests/core/dialog_tests.js
index be012a8c8e7..7079c2536c9 100644
--- a/addons/web/static/tests/core/dialog_tests.js
+++ b/addons/web/static/tests/core/dialog_tests.js
@@ -116,6 +116,33 @@ QUnit.module("Components", (hooks) => {
         assert.verifySteps(["close"]);
     });
 
+    QUnit.test(
+        "click on the button x triggers the close defined by a Child component",
+        async function (assert) {
+            assert.expect(3);
+            const env = await makeDialogTestEnv();
+            class Child extends Component {
+                static template = xml`<div>Hello</div>`;
+
+                setup() {
+                    this.env.dialogData.close = () => assert.step("close");
+                }
+            }
+            class Parent extends Component {}
+            Parent.template = xml`
+            <Dialog>
+                <Child/>
+            </Dialog>
+        `;
+            Parent.components = { Child, Dialog };
+            parent = await mount(Parent, target, { env });
+            assert.containsOnce(target, ".o_dialog");
+
+            await click(target, ".o_dialog header button.btn-close");
+            assert.verifySteps(["close"]);
+        }
+    );
+
     QUnit.test(
         "click on the default footer button triggers the service close",
         async function (assert) {