diff --git a/MANIFEST.in b/MANIFEST.in
index f921a1b..576db78 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,2 +1,3 @@
 include *.rst
 recursive-include tests *.py
+include msrest/py.typed
\ No newline at end of file
diff --git a/msrest/py.typed b/msrest/py.typed
new file mode 100644
index 0000000..e5aff4f
--- /dev/null
+++ b/msrest/py.typed
@@ -0,0 +1 @@
+# Marker file for PEP 561.
\ No newline at end of file
diff --git a/setup.py b/setup.py
index 8576c45..cafaa5f 100644
--- a/setup.py
+++ b/setup.py
@@ -53,6 +53,10 @@ setup(
         "isodate>=0.6.0",
         "certifi>=2017.4.17",
     ],
+    include_package_data=True,
+    package_data={
+        'pytyped': ['py.typed'],
+    },
     extras_require={
         ":python_version<'3.4'": ['enum34>=1.0.4'],
         ":python_version<'3.5'": ['typing'],