diff --git a/core/src/main/java/hudson/tasks/junit/TestObject.java b/core/src/main/java/hudson/tasks/junit/TestObject.java
index 27dd04959c2720f8fc1a94a755957d0334c71c2b..1d2b0ea912db536b113ba9eb76aad40e53ebb3ab 100644
--- a/core/src/main/java/hudson/tasks/junit/TestObject.java
+++ b/core/src/main/java/hudson/tasks/junit/TestObject.java
@@ -27,4 +27,6 @@ public abstract class TestObject implements ModelObject, Serializable {
     protected static String safe(String s) {
         return s.replace('/','_').replace(':','_');
     }
+
+    private static final long serialVersionUID = 1L;
 }