diff --git a/common/source/java/ch/systemsx/cisd/common/serviceconversation/server/BidirectionalServiceMessenger.java b/common/source/java/ch/systemsx/cisd/common/serviceconversation/server/BidirectionalServiceMessenger.java
index 2ad95fd7057d9ec204a654984e2c0e41b5edafe7..7c8e010aa80a9f23c31dd2f90e6d04439ecb44e6 100644
--- a/common/source/java/ch/systemsx/cisd/common/serviceconversation/server/BidirectionalServiceMessenger.java
+++ b/common/source/java/ch/systemsx/cisd/common/serviceconversation/server/BidirectionalServiceMessenger.java
@@ -140,7 +140,7 @@ class BidirectionalServiceMessenger
                 public synchronized void sendProgress(ProgressInfo progress)
                 {
                     responseMessenger.send(new ServiceMessage(conversationId,
-                            nextOutgoingMessageIndex(), false, progress));
+                            nextOutgoingMessageIndex(), progress));
                 }
 
                 @Override