diff --git a/imixs-workflow-core/src/main/java/org/imixs/workflow/bpmn/BPMNModelHandler.java b/imixs-workflow-core/src/main/java/org/imixs/workflow/bpmn/BPMNModelHandler.java
index f06163426..e035e5339 100644
--- a/imixs-workflow-core/src/main/java/org/imixs/workflow/bpmn/BPMNModelHandler.java
+++ b/imixs-workflow-core/src/main/java/org/imixs/workflow/bpmn/BPMNModelHandler.java
@@ -1494,7 +1494,7 @@ private void adaptDeprecatedEventProperties(ItemCollection eventEntity) {
         // timer
         if (!eventEntity.hasItem(BPMNModel.EVENT_ITEM_TIMER_ACTIVE)) {
             eventEntity.setItemValue(BPMNModel.EVENT_ITEM_TIMER_ACTIVE,
-                    new Boolean("1".equals(eventEntity.getItemValueString("keyscheduledactivity"))));
+                     Boolean.valueOf("1".equals(eventEntity.getItemValueString("keyscheduledactivity"))));
         }
         if (!eventEntity.hasItem("keyscheduledactivity")) {
             if (eventEntity.getItemValueBoolean(BPMNModel.EVENT_ITEM_TIMER_ACTIVE)) {