diff --git a/deploy.py b/deploy.py
index 6463d39..8a58d96 100755
--- a/deploy.py
+++ b/deploy.py
@@ -839,7 +839,7 @@ if __name__ == "__main__":
   )
   main_parser.add_argument(
       "--ctap2.1",
-      action=RemoveConstAction,
+      action="append_const",
       const="with_ctap2_1",
       dest="features",
       help=("Compiles the OpenSK application with backward compatible "