diff --git a/Lib/distutils/command/bdist_msi.py b/Lib/distutils/command/bdist_msi.py
index 2e5685f..c4be47b 100644
--- a/Lib/distutils/command/bdist_msi.py
+++ b/Lib/distutils/command/bdist_msi.py
@@ -314,8 +314,7 @@
                             key = seen[afile]
                             add_data(self.db, "DuplicateFile",
                                 [(key + version, dir.component, key, None, dir.logical)])
-
-
+            db.Commit()
         cab.commit(db)
 
     def add_find_python(self):