diff --git a/baselines/common/cmd_util.py b/baselines/common/cmd_util.py
index b6a6844..e3c770a 100644
--- a/baselines/common/cmd_util.py
+++ b/baselines/common/cmd_util.py
@@ -72,11 +72,8 @@ def atari_arg_parser():
     """
     Create an argparse.ArgumentParser for run_atari.py.
     """
-    parser = arg_parser()
-    parser.add_argument('--env', help='environment ID', default='BreakoutNoFrameskip-v4')
-    parser.add_argument('--seed', help='RNG seed', type=int, default=None)
-    parser.add_argument('--num-timesteps', type=int, default=int(10e6))
-    return parser
+    print('Obsolete - use common_arg_parser instead')
+    return common_arg_parser()
 
 def mujoco_arg_parser():
     print('Obsolete - use common_arg_parser instead')