diff --git a/pyproject.toml b/pyproject.toml
index 1cf28577..800bb0f3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -50,6 +50,7 @@ dev = [
 
 [tool.setuptools.package-data]
 pvi = [
+    "py.typed",
     "_format/*.adl",
     "_format/*.edl",
     "_format/*.bob",
diff --git a/src/pvi/py.typed b/src/pvi/py.typed
new file mode 100644
index 00000000..e69de29b