diff --git a/src/Spring/Spring.Messaging/Messaging/Listener/AbstractSendToQueueExceptionHandler.cs b/src/Spring/Spring.Messaging/Messaging/Listener/AbstractSendToQueueExceptionHandler.cs
index 33aa727b..9d266ad2 100644
--- a/src/Spring/Spring.Messaging/Messaging/Listener/AbstractSendToQueueExceptionHandler.cs
+++ b/src/Spring/Spring.Messaging/Messaging/Listener/AbstractSendToQueueExceptionHandler.cs
@@ -15,7 +15,7 @@ namespace Spring.Messaging.Listener
     /// of the Message Ids of messages.
     /// </remarks>
     /// <author>Mark Pollack</author>
-    public class AbstractSendToQueueExceptionHandler : IInitializingObject, IApplicationContextAware
+    public abstract class AbstractSendToQueueExceptionHandler : IInitializingObject, IApplicationContextAware
     {
         private int maxRetry = 5;