diff --git a/core/src/main/java/ch/cyberduck/core/worker/AbstractTransferWorker.java b/core/src/main/java/ch/cyberduck/core/worker/AbstractTransferWorker.java
index d083c00b8ee..048c433f5f6 100644
--- a/core/src/main/java/ch/cyberduck/core/worker/AbstractTransferWorker.java
+++ b/core/src/main/java/ch/cyberduck/core/worker/AbstractTransferWorker.java
@@ -156,8 +156,11 @@ public Boolean initialize() {
 
     @Override
     public void cancel() {
-        for(TransferStatus status : table.values()) {
+        for(Map.Entry<TransferItem, TransferStatus> entry : table.entrySet()) {
+            final TransferItem item = entry.getKey();
+            final TransferStatus status = entry.getValue();
             for(TransferStatus segment : status.getSegments()) {
+                log.warn("Cancel segment {} of item {}", segment, item);
                 segment.setCanceled();
             }
         }