diff --git a/navalplanner-webapp/src/main/java/org/navalplanner/web/planner/reassign/ReassignController.java b/navalplanner-webapp/src/main/java/org/navalplanner/web/planner/reassign/ReassignController.java
index a150068a2..aea7c685b 100644
--- a/navalplanner-webapp/src/main/java/org/navalplanner/web/planner/reassign/ReassignController.java
+++ b/navalplanner-webapp/src/main/java/org/navalplanner/web/planner/reassign/ReassignController.java
@@ -32,6 +32,8 @@ import org.springframework.context.annotation.Scope;
 import org.springframework.stereotype.Component;
 import org.zkoss.ganttz.timetracker.ICellForDetailItemRenderer;
 import org.zkoss.ganttz.timetracker.OnColumnsRowRenderer;
+import org.zkoss.ganttz.util.LongOperationFeedback;
+import org.zkoss.ganttz.util.LongOperationFeedback.ILongOperation;
 import org.zkoss.zk.ui.Executions;
 import org.zkoss.zk.ui.WrongValueException;
 import org.zkoss.zk.ui.event.Event;
@@ -143,11 +145,22 @@ public class ReassignController extends GenericForwardComposer {
             }
         }
         window.setVisible(false);
-        LocalDate associatedDate = this.associatedDate.getValue() != null ? LocalDate
+        final LocalDate associatedDate = this.associatedDate.getValue() != null ? LocalDate
                 .fromDateFields(this.associatedDate.getValue())
                 : null;
-        configurationResult.result(ReassignConfiguration
-                .create(currentType, associatedDate));
+        LongOperationFeedback.execute(window, new ILongOperation() {
+
+            @Override
+            public String getName() {
+                return _("Doing Reassignation");
+            }
+
+            @Override
+            public void doAction() throws Exception {
+                configurationResult.result(ReassignConfiguration.create(
+                        currentType, associatedDate));
+            }
+        });
     }
 
     public void cancel() {