diff --git a/tiramisu/option.py b/tiramisu/option.py
index 31f8cc8..724c691 100644
--- a/tiramisu/option.py
+++ b/tiramisu/option.py
@@ -1002,8 +1002,8 @@ def validate_requires_arg(requires, name):
     for opt_requires in ret_requires.values():
         ret_action = []
         for require in opt_requires.values():
-            req = (require[0], tuple(require[1]),
-                   require[2], require[3], require[4], require[5])
+            req = (require[0], tuple(require[1]), require[2], require[3],
+                   require[4], require[5])
             ret_action.append(req)
         ret.append(tuple(ret_action))
     return frozenset(config_action.keys()), tuple(ret)