diff --git a/MANIFEST.in b/MANIFEST.in
index 2fb6b766..02b0deb6 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,2 +1,3 @@
 include src/google_crc32c_build.py
 include LICENSE
+include src/google_c2c32c/py.typed