diff --git a/src/model.js b/src/model.js
index e0db08a95a..675ec1f08c 100644
--- a/src/model.js
+++ b/src/model.js
@@ -2400,6 +2400,9 @@
         set_state: function(record, states) {
             this._set_default_value(record);
             Sao.field.One2Many._super.set_state.call(this, record, states);
+        },
+        _is_empty: function(record) {
+            return jQuery.isEmptyObject(this.get_eval(record));
         }
     });