diff --git a/compiler/one-cmds/one-import-onnx b/compiler/one-cmds/one-import-onnx
index 2d50ecc58b5..4a1960e332c 100644
--- a/compiler/one-cmds/one-import-onnx
+++ b/compiler/one-cmds/one-import-onnx
@@ -195,8 +195,6 @@ def _get_parser():
                                action='store_true',
                                help='Disable one-import-onnx-ext for second attempt')
 
-    parser.add_argument('--use_extension', type=str, help=argparse.SUPPRESS)
-
     # save intermediate file(s)
     parser.add_argument('--save_intermediate',
                         action='store_true',