diff --git a/fiddle/_src/config.py b/fiddle/_src/config.py
index a015767e..9d4a07b7 100644
--- a/fiddle/_src/config.py
+++ b/fiddle/_src/config.py
@@ -353,7 +353,11 @@ def __getattr__(self, name: str):
       )
     if param is not None and param.default is not param.empty:
       return param.default
-    msg = f"No parameter '{name}' has been set on {self!r}."
+    msg = (
+        f"No parameter '{name}' has been set on {self!r} "
+        f"(Buildable='{self.__fn_or_cls__.__qualname__}', missing "
+        f"parameter='{name}')."
+    )
     # TODO(b/219988937): Implement an edit distance function and display valid
     # attributes that are close to `name`.
     if hasattr(self.__fn_or_cls__, name):
diff --git a/fiddle/_src/config_test.py b/fiddle/_src/config_test.py
index 7e123cbf..4510b97d 100644
--- a/fiddle/_src/config_test.py
+++ b/fiddle/_src/config_test.py
@@ -843,8 +843,11 @@ def test_repr_varkwargs(self):
 
   def test_nonexistent_attribute_error(self):
     class_config = fdl.Config(SampleClass, 1)
-    expected_msg = (r"No parameter 'nonexistent_arg' has been set on "
-                    r'<Config\[SampleClass\(arg1=1\)\]>\.')
+    expected_msg = (
+        r"No parameter 'nonexistent_arg' has been set on "
+        r'<Config\[SampleClass\(arg1=1\)\]> \(Buildable='
+        r"'SampleClass', missing parameter='nonexistent_arg'\)."
+    )
     with self.assertRaisesRegex(AttributeError, expected_msg):
       getattr(class_config, 'nonexistent_arg')