diff --git a/python_modules/build_iso.py b/python_modules/build_iso.py
index 39b5a257..02dd58aa 100644
--- a/python_modules/build_iso.py
+++ b/python_modules/build_iso.py
@@ -253,7 +253,7 @@ class Decsions:
                                                " b-deb64",
                                           type=str
                                           )
-                self.argument_parser.add_argument("b",
+          self.argument_parser.add_argument("b",
                                           help="identify the ISO to"
                                                "build for example"
                                                " b-loadxfdeb",