diff --git a/src/diffusers/models/unets/unet_2d.py b/src/diffusers/models/unets/unet_2d.py
index 5a7fc32223d6..448ec051a032 100644
--- a/src/diffusers/models/unets/unet_2d.py
+++ b/src/diffusers/models/unets/unet_2d.py
@@ -240,7 +240,6 @@ def __init__(
                 dropout=dropout,
             )
             self.up_blocks.append(up_block)
-            prev_output_channel = output_channel
 
         # out
         num_groups_out = norm_num_groups if norm_num_groups is not None else min(block_out_channels[0] // 4, 32)