diff --git a/src/model.js b/src/model.js
index 2c0158924c..c71ad75d1d 100644
--- a/src/model.js
+++ b/src/model.js
@@ -1122,7 +1122,7 @@
                     if (fields && !~fields.indexOf(fname)) {
                         continue;
                     }
-                    if (field.get_state_attrs(this).readonly) {
+                    if (field.description.readonly) {
                         continue;
                     }
                     if (~exclude_fields.indexOf(fname)) {