diff --git a/bundles/icinga2/items.py b/bundles/icinga2/items.py
index bba9b1a..d08918d 100644
--- a/bundles/icinga2/items.py
+++ b/bundles/icinga2/items.py
@@ -290,7 +290,7 @@ for n in monitored_nodes[:]:
 
 bundle_metadata = {}
 for monitored_node in monitored_nodes:
-    node_metadata = monitored_node.metadata.copy()
+    node_metadata = monitored_node.metadata
 
     for bundle, config in sorted(node_metadata.get('icinga2_api', {}).items()):
         if bundle not in bundle_metadata: