1 files changed, 2 insertions, 0 deletions
diff --git a/vaadin-app/src/ch/asynk/helloworld/DataMappingLayout.java b/vaadin-app/src/ch/asynk/helloworld/DataMappingLayout.java
index 3748bee..301d1aa 100644
--- a/vaadin-app/src/ch/asynk/helloworld/DataMappingLayout.java
+++ b/vaadin-app/src/ch/asynk/helloworld/DataMappingLayout.java
@@ -14,6 +14,8 @@ import com.vaadin.ui.TextField;
 
 public class DataMappingLayout extends FormLayout {
 
+    private static final long serialVersionUID = 1L;
+
     public DataMappingLayout() {
         //
         final TextField tf1 = new TextField("Property.ValueChangeListener");