1 files changed, 6 insertions, 2 deletions
diff --git a/python/vyos/configdict.py b/python/vyos/configdict.py
index 0969a5353..e15579b95 100644
--- a/python/vyos/configdict.py
+++ b/python/vyos/configdict.py
@@ -108,16 +108,20 @@ def leaf_node_changed(conf, path):
     """
     Check if a leaf node was altered. If it has been altered - values has been
     changed, or it was added/removed, we will return a list containing the old
-    value(s). If nothing has been changed, None is returned
+    value(s). If nothing has been changed, None is returned.
+
+    NOTE: path must use the real CLI node name (e.g. with a hyphen!)
     """
     from vyos.configdiff import get_config_diff
     D = get_config_diff(conf, key_mangling=('-', '_'))
     D.set_level(conf.get_level())
     (new, old) = D.get_value_diff(path)
     if new != old:
+        if old is None:
+            return ['']
         if isinstance(old, str):
             return [old]
-        elif isinstance(old, list):
+        if isinstance(old, list):
             if isinstance(new, str):
                 new = [new]
             elif isinstance(new, type(None)):