--- old/src/share/classes/java/awt/dnd/InvalidDnDOperationException.java	2012-08-28 18:05:18.771120100 +0400
+++ new/src/share/classes/java/awt/dnd/InvalidDnDOperationException.java	2012-08-28 18:05:18.074080200 +0400
@@ -36,6 +36,8 @@
 
 public class InvalidDnDOperationException extends IllegalStateException {
 
+    private static final long serialVersionUID = -6062568741193956678L;
+
     static private String dft_msg = "The operation requested cannot be performed by the DnD system since it is not in the appropriate state";
 
     /**