diff --git a/addons/web/static/src/js/view_form.js b/addons/web/static/src/js/view_form.js
index 819920f89b3..be16faa309a 100644
--- a/addons/web/static/src/js/view_form.js
+++ b/addons/web/static/src/js/view_form.js
@@ -3885,7 +3885,6 @@ instance.web.form.One2ManyListView = instance.web.ListView.extend({
         if (!this.fields_view || !this.editable()){
             return true;
         }
-        this.o2m._dirty_flag = true;
         var r;
         return _.every(this.records.records, function(record){
             r = record;