diff --git a/li.strolch.service/src/main/java/li/strolch/execution/EventBasedExecutionHandler.java b/li.strolch.service/src/main/java/li/strolch/execution/EventBasedExecutionHandler.java
index 2780788d1..e060a00b6 100644
--- a/li.strolch.service/src/main/java/li/strolch/execution/EventBasedExecutionHandler.java
+++ b/li.strolch.service/src/main/java/li/strolch/execution/EventBasedExecutionHandler.java
@@ -66,7 +66,7 @@ public class EventBasedExecutionHandler extends ExecutionHandler {
 
 	@Override
 	public void initialize(ComponentConfiguration configuration) throws Exception {
-		this.controllers = synchronizedMapOfMaps(new MapOfMaps<>());
+		this.controllers = synchronizedMapOfMaps(new MapOfMaps<>(true));
 		super.initialize(configuration);
 	}