diff --git a/dash/development/base_component.py b/dash/development/base_component.py
index 4ce2fd6e1b..f52ea5803c 100644
--- a/dash/development/base_component.py
+++ b/dash/development/base_component.py
@@ -103,7 +103,7 @@ def _get_set_or_delete(self, id, operation, new_item=None):
 
         # The end of our branch
         # If we were in a list, then this exception will get caught
-        raise KeyError
+        raise KeyError(id)
 
     # Supply ABC methods for a MutableMapping:
     # - __getitem__