diff --git a/core/src/main/java/hudson/slaves/OfflineCause.java b/core/src/main/java/hudson/slaves/OfflineCause.java
index 3d711dd5f0ccd710fd267d94172871879b88aa36..7c5c77861fa695cfe7fbd28a0148840403562e21 100644
--- a/core/src/main/java/hudson/slaves/OfflineCause.java
+++ b/core/src/main/java/hudson/slaves/OfflineCause.java
@@ -103,7 +103,6 @@ public abstract class OfflineCause {
      * Caused by unexpected channel termination.
      */
     public static class ChannelTermination extends OfflineCause {
-        @Exported
         public final Exception cause;
 
         public ChannelTermination(Exception cause) {