diff --git a/mypy/semanal_main.py b/mypy/semanal_main.py
index d7e9712fa427..8e8c455dd686 100644
--- a/mypy/semanal_main.py
+++ b/mypy/semanal_main.py
@@ -75,6 +75,7 @@
     "abc",
     "collections",
     "collections.abc",
+    "typing_extensions",
 ]