diff --git a/meshtastic/mesh_interface.py b/meshtastic/mesh_interface.py
index 3d527ac..934bedc 100644
--- a/meshtastic/mesh_interface.py
+++ b/meshtastic/mesh_interface.py
@@ -284,7 +284,7 @@ class MeshInterface:  # pylint: disable=R0902
                 logging.debug("getNestedValue was called without a nested path.")
                 return None
             keys = key_path.split(".")
-            value = node_dict
+            value: Union[str, dict, None] = node_dict
             for key in keys:
                 if isinstance(value, dict):
                     value = value.get(key)