diff --git a/MANIFEST.in b/MANIFEST.in
index 76c7654d8..4d89cab64 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -3,6 +3,7 @@ include CHANGELOG.rst
 include CONTRIBUTING.rst
 include LICENSE
 include requirements.txt
+include src/aws_encryption_sdk/py.typed
 
 recursive-include doc *
 recursive-include test *.py
diff --git a/setup.py b/setup.py
index fb249a3f6..ef36c03f7 100644
--- a/setup.py
+++ b/setup.py
@@ -32,6 +32,7 @@ def get_requirements():
     name="aws-encryption-sdk",
     packages=find_packages("src"),
     package_dir={"": "src"},
+    package_data={"aws_encryption_sdk": ["py.typed"]},
     version=get_version(),
     author="Amazon Web Services",
     maintainer="Amazon Web Services",
diff --git a/src/aws_encryption_sdk/py.typed b/src/aws_encryption_sdk/py.typed
new file mode 100644
index 000000000..b648ac923
--- /dev/null
+++ b/src/aws_encryption_sdk/py.typed
@@ -0,0 +1 @@
+partial