diff --git a/MySQLdb/MANIFEST.in b/MySQLdb/MANIFEST.in
index c804584..f26a5e7 100644
--- a/MySQLdb/MANIFEST.in
+++ b/MySQLdb/MANIFEST.in
@@ -12,5 +12,6 @@ include test_capabilities.py
 include test_MySQLdb_capabilities.py
 include metadata.cfg
 include site.cfg
+include setup_common.py
 include setup_posix.py
 include setup_windows.py