diff --git a/comfy/ldm/pixart/blocks.py b/comfy/ldm/pixart/blocks.py
index 967a224a..40b0663e 100644
--- a/comfy/ldm/pixart/blocks.py
+++ b/comfy/ldm/pixart/blocks.py
@@ -10,12 +10,12 @@ from comfy import model_management
 from comfy.ldm.modules.diffusionmodules.mmdit import TimestepEmbedder, Mlp, timestep_embedding
 from comfy.ldm.modules.attention import optimized_attention
 
-if model_management.xformers_enabled():
-    import xformers.ops
-    if int((xformers.__version__).split(".")[2].split("+")[0]) >= 28:
-        block_diagonal_mask_from_seqlens = xformers.ops.fmha.attn_bias.BlockDiagonalMask.from_seqlens
-    else:
-        block_diagonal_mask_from_seqlens = xformers.ops.fmha.BlockDiagonalMask.from_seqlens
+# if model_management.xformers_enabled():
+#     import xformers.ops
+#     if int((xformers.__version__).split(".")[2].split("+")[0]) >= 28:
+#         block_diagonal_mask_from_seqlens = xformers.ops.fmha.attn_bias.BlockDiagonalMask.from_seqlens
+#     else:
+#         block_diagonal_mask_from_seqlens = xformers.ops.fmha.BlockDiagonalMask.from_seqlens
 
 def modulate(x, shift, scale):
     return x * (1 + scale.unsqueeze(1)) + shift.unsqueeze(1)