diff --git a/synthtool/gcp/templates/python_library/MANIFEST.in b/synthtool/gcp/templates/python_library/MANIFEST.in
index e9e29d120..e783f4c62 100644
--- a/synthtool/gcp/templates/python_library/MANIFEST.in
+++ b/synthtool/gcp/templates/python_library/MANIFEST.in
@@ -16,10 +16,10 @@
 
 # Generated by synthtool. DO NOT EDIT!
 include README.rst LICENSE
-recursive-include google *.json *.proto
+recursive-include google *.json *.proto py.typed
 recursive-include tests *
 global-exclude *.py[co]
 global-exclude __pycache__
 
 # Exclude scripts for samples readmegen
-prune scripts/readme-gen
\ No newline at end of file
+prune scripts/readme-gen