diff --git a/muse_maskgit_pytorch/dataset.py b/muse_maskgit_pytorch/dataset.py
index 6eb3693..34c95a0 100644
--- a/muse_maskgit_pytorch/dataset.py
+++ b/muse_maskgit_pytorch/dataset.py
@@ -46,7 +46,7 @@ def __init__(
         stream=False,
         using_taming=False,
         random_crop=False,
-        alpha_channel=True,
+        alpha_channel=False,
     ):
         super().__init__()
         self.dataset = dataset