diff --git a/addons/web_editor/static/src/js/backend.js b/addons/web_editor/static/src/js/backend.js
index 31e92228767..849ca71a76d 100644
--- a/addons/web_editor/static/src/js/backend.js
+++ b/addons/web_editor/static/src/js/backend.js
@@ -43,6 +43,9 @@ var FieldTextHtmlSimple = basic_fields.DebouncedField.extend(TranslatableFieldMi
             var layoutInfo = this.$textarea.data('layoutInfo');
             $.summernote.pluginEvents.codeview(undefined, undefined, layoutInfo, false);
         }
+        if (this._getValue() !== this.value) {
+            this._isDirty = true;
+        }
         this._super.apply(this, arguments);
     },
     /**