diff --git a/setup.py b/setup.py
index 3d14fd4..44f8392 100644
--- a/setup.py
+++ b/setup.py
@@ -64,7 +64,7 @@ def get_long_description() -> str:
     ext_modules=ext_modules,
     packages=["blackd", "black", "blib2to3", "blib2to3.pgen2"],
     package_dir={"": "src"},
-    package_data={"blib2to3": ["*.txt"]},
+    package_data={"blib2to3": ["*.txt"], "black": ["py.typed"]},
     python_requires=">=3.6",
     zip_safe=False,
     install_requires=[
diff --git a/src/black/py.typed b/src/black/py.typed
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/src/black/py.typed
@@ -0,0 +1 @@
+