diff --git a/libc/tools/mypy.ini b/libc/tools/mypy.ini
new file mode 100644
index 0000000..0269354
--- /dev/null
+++ b/libc/tools/mypy.ini
@@ -0,0 +1,3 @@
+[mypy]
+# TODO: Enable.
+# disallow_untyped_defs = True