diff --git a/scripts/q7s-cp.py b/scripts/q7s-cp.py
index 3df6d662..9bc18201 100755
--- a/scripts/q7s-cp.py
+++ b/scripts/q7s-cp.py
@@ -92,7 +92,7 @@ def build_cmd(args):
         else:
             target = args.target
     if args.invert:
-        cmd += f"{port_args} {address}:{args.source} {target}"
+        cmd += f"{port_args} {address}:{source_files} {target}"
     else:
         cmd += f"{port_args} {source_files} {address}:{target}"
     return cmd