diff --git a/Tools/msi/msi.py b/Tools/msi/msi.py
index a18debc5249..38f34438c34 100644
--- a/Tools/msi/msi.py
+++ b/Tools/msi/msi.py
@@ -97,7 +97,9 @@
     '_sqlite3.pyd',
     '_hashlib.pyd',
     '_multiprocessing.pyd',
-    '_lzma.pyd'
+    '_lzma.pyd',
+    '_decimal.pyd',
+    '_testbuffer.pyd'
 ]
 
 # Well-known component UUIDs