diff --git a/cmk/base/plugins/agent_based/esx_vsphere_snapshot.py b/cmk/base/plugins/agent_based/esx_vsphere_snapshot.py
index 478bab76488..2bb9ee37cb1 100644
--- a/cmk/base/plugins/agent_based/esx_vsphere_snapshot.py
+++ b/cmk/base/plugins/agent_based/esx_vsphere_snapshot.py
@@ -5,7 +5,7 @@
 
 import datetime
 import json
-from collections.abc import Mapping, Sequence
+from collections.abc import Mapping, Optional, Sequence
 from typing import Any, NamedTuple
 
 from cmk.plugins.lib import esx_vsphere
@@ -18,7 +18,7 @@ class Snapshot(NamedTuple):
     time: int
     state: str
     name: str
-    vm: str
+    vm: Optional[str] = None
 
 
 Section = Sequence[Snapshot]