diff --git a/Tools/msi/msi.py b/Tools/msi/msi.py
index ba311bcc138..44bca1bd45a 100644
--- a/Tools/msi/msi.py
+++ b/Tools/msi/msi.py
@@ -92,7 +92,8 @@ extensions = [
     '_ctypes.pyd',
     '_ctypes_test.pyd',
     '_sqlite3.pyd',
-    '_hashlib.pyd'
+    '_hashlib.pyd',
+    '_multiprocessing.pyd'
 ]
 
 # Well-known component UUIDs