diff --git a/src/chop/nn/quantizers/block_minifloat.py b/src/chop/nn/quantizers/block_minifloat.py
index 34e00bbcb..f10df89b2 100644
--- a/src/chop/nn/quantizers/block_minifloat.py
+++ b/src/chop/nn/quantizers/block_minifloat.py
@@ -84,11 +84,6 @@ def forward(
     def backward(
         ctx,
         grad_output: Tensor,
-        width: int,
-        exponent_width: int,
-        exponent_bias_width: int,
-        block_size: list[int] | int = [16],
-        skip_first_dim: bool = False,
     ):
         return grad_output, None, None, None, None, None