1 files changed, 1 insertions, 0 deletions
diff --git a/setup.cfg b/setup.cfg
index 8256945a2..51d6131da 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -45,6 +45,7 @@ warn_unused_ignores = True
 disallow_any_generics = True
 show_error_codes = True
 enable_error_code = ignore-without-code
+check_untyped_defs = True
 
 [mypy-astroid.*]
 ignore_missing_imports = True