diff --git a/demucs/__main__.py b/demucs/__main__.py
index 6c5d1454..3f8f2ea3 100755
--- a/demucs/__main__.py
+++ b/demucs/__main__.py
@@ -207,8 +207,7 @@ def main():
             else:
                 mus_train, mus_valid = get_compressed_datasets(args, samples)
             train_set = ConcatDataset([train_set, mus_train])
-            if not args.plop:
-                valid_set = ConcatDataset([valid_set, mus_valid])
+            valid_set = ConcatDataset([valid_set, mus_valid])
     elif args.is_wav:
         train_set, valid_set = get_musdb_wav_datasets(args, samples, model.sources)
     else:
diff --git a/demucs/parser.py b/demucs/parser.py
index 80043593..9e49ec6a 100644
--- a/demucs/parser.py
+++ b/demucs/parser.py
@@ -37,8 +37,6 @@ def get_parser():
                              "subfolder.")
     parser.add_argument("--concat", action='store_true',
                         help="Concat MusDB and wav dataset when provided.")
-    parser.add_argument("--plop", action='store_true',
-                        help="Concat MusDB and wav dataset when provided.")
     parser.add_argument("--samplerate", type=int, default=44100)
     parser.add_argument("--audio_channels", type=int, default=2)
     parser.add_argument("--samples",