diff --git a/pkgs/additional/sane-scripts/src/sane-sync-music b/pkgs/additional/sane-scripts/src/sane-sync-music
index 25f3014c9..04f56f2cb 100755
--- a/pkgs/additional/sane-scripts/src/sane-sync-music
+++ b/pkgs/additional/sane-scripts/src/sane-sync-music
@@ -384,7 +384,7 @@ def main() -> None:
     parser.add_argument("dest", help="destination directory")
     parser.add_argument("--compress", action='store_true', help="compress audio files (to mp3)")
     parser.add_argument("--compat", action='store_true', help="convert poorly supported file formats to better-supported formats (e.g. avoid wma)")
-    parser.add_argument("--jobs", help="number of cores to compress music with (default: all CPU cores)", default=None, type=int)
+    parser.add_argument("--jobs", help="number of cores to compress music with. N.B.: some remote filesystems (e.g. curlftpfs) suffer degraded perf when multithreading!", default=1, type=int)
     parser.add_argument("--dry-run", action='store_true', help="don't actually run any commands")
     parser.add_argument("--verbose", action='store_true', help="more logging")
     parser.add_argument("--quiet", action='store_true', help="less logging")
@@ -404,7 +404,7 @@ def main() -> None:
         compat=args.compat,
         force_copy=args.force_copy,
         dry_run=args.dry_run,
-        jobs=args.jobs,
+        jobs=args.jobs if args.jobs else None,
     )
 
 if __name__ == '__main__':