diff --git a/setup.py b/setup.py
index a6cd932..754339c 100644
--- a/setup.py
+++ b/setup.py
@@ -4,7 +4,7 @@
   name = 'x-clip',
   packages = find_packages(exclude=[]),
   include_package_data = True,
-  version = '0.7.1',
+  version = '0.7.2',
   license='MIT',
   description = 'X-CLIP',
   author = 'Phil Wang',
diff --git a/x_clip/visual_ssl.py b/x_clip/visual_ssl.py
index 5115c30..ae9e376 100644
--- a/x_clip/visual_ssl.py
+++ b/x_clip/visual_ssl.py
@@ -21,12 +21,16 @@ def forward(self, x):
             return x
         return self.fn(x)
 
-def get_default_aug(image_size, is_rgb = True):
+def get_default_aug(image_size, channels = 3):
+    is_rgb = channels == 3
+    is_greyscale = channels == 1
+    rgb_or_greyscale = is_rgb or is_greyscale
+
     return torch.nn.Sequential(
         RandomApply(
             T.ColorJitter(0.8, 0.8, 0.8, 0.2),
             p = 0.3
-        ),
+        ) if rgb_or_greyscale else nn.Identity(),
         T.RandomGrayscale(p = 0.2) if is_rgb else nn.Identity(),
         T.RandomHorizontalFlip(),
         RandomApply(
@@ -217,7 +221,7 @@ def __init__(
 
         # default SimCLR augmentation
 
-        self.augment1 = default(augment_fn, get_default_aug(image_size, is_rgb = channels == 3))
+        self.augment1 = default(augment_fn, get_default_aug(image_size, channels))
         self.augment2 = default(augment_fn2, self.augment1)
 
         self.online_encoder = NetWrapper(net, projection_size, projection_hidden_size, layer=hidden_layer)
@@ -272,7 +276,7 @@ def __init__(
     ):
         super().__init__()
         self.net = NetWrapper(net, project_dim, layer = hidden_layer)
-        self.augment = default(augment_fn, get_default_aug(image_size, is_rgb = channels == 3))
+        self.augment = default(augment_fn, get_default_aug(image_size, channels))
         self.augment_both = augment_both
         self.temperature = temperature