diff --git a/addons/web_editor/static/src/js/backend/html_field.js b/addons/web_editor/static/src/js/backend/html_field.js
index 50f229d88e4..815b0d603b2 100644
--- a/addons/web_editor/static/src/js/backend/html_field.js
+++ b/addons/web_editor/static/src/js/backend/html_field.js
@@ -186,7 +186,7 @@ export class HtmlField extends Component {
     }
     updateValue() {
         const value = this.getEditingValue();
-        if (value !== null && value !== this.props.value) {
+        if (value !== null && value !== (this.props.value || '').toString()) {
             if (this.props.setDirty) {
                 this.props.setDirty(true);
             }