diff --git a/bemani/utils/afputils.py b/bemani/utils/afputils.py
index cbc3409..3c3ac1d 100644
--- a/bemani/utils/afputils.py
+++ b/bemani/utils/afputils.py
@@ -1721,7 +1721,7 @@ def main() -> int:
             afpfile.unparse()
         else:
             print(f"Writing {args.file}...")
-            with open(args.file + ".tmp", "wb") as bfp:
+            with open(args.file, "wb") as bfp:
                 bfp.write(afpfile.unparse())
 
     return 0