1 files changed, 2 insertions, 1 deletions
diff --git a/server/src/com/vaadin/data/fieldgroup/FieldGroup.java b/server/src/com/vaadin/data/fieldgroup/FieldGroup.java
index 377acf3363..3a60b6912c 100644
--- a/server/src/com/vaadin/data/fieldgroup/FieldGroup.java
+++ b/server/src/com/vaadin/data/fieldgroup/FieldGroup.java
@@ -209,7 +209,8 @@ public class FieldGroup implements Serializable {
     public void setReadOnly(boolean fieldsReadOnly) {
         readOnly = fieldsReadOnly;
         for (Field<?> field : getFields()) {
-            if (!field.getPropertyDataSource().isReadOnly()) {
+            if (field.getPropertyDataSource() == null
+                    || !field.getPropertyDataSource().isReadOnly()) {
                 field.setReadOnly(fieldsReadOnly);
             } else {
                 field.setReadOnly(true);