diff --git a/etiquette/objects.py b/etiquette/objects.py
index b76c61f..8ee2cd5 100644
--- a/etiquette/objects.py
+++ b/etiquette/objects.py
@@ -1251,7 +1251,7 @@ class Tag(ObjectBase, GroupableMixin):
         except exceptions.NoSuchTag:
             pass
         else:
-            raise exceptions.TagExists(existing_tag)
+            raise exceptions.TagExists(new_name)
 
         self._cached_qualified_name = None
         self.photodb._cached_frozen_children = None