diff --git a/utils/torch_utils.py b/utils/torch_utils.py
index fe934abf118c..77549b005ceb 100644
--- a/utils/torch_utils.py
+++ b/utils/torch_utils.py
@@ -82,7 +82,7 @@ def reshape_classifier_output(model, n=1000):
         elif nn.Conv2d in types:
             i = types.index(nn.Conv2d)  # nn.Conv2d index
             if m[i].out_channels != n:
-                m[i] = nn.Conv2d(m[i].in_channels, n, m[i].kernel_size, m[i].stride, bias=m[i].bias)
+                m[i] = nn.Conv2d(m[i].in_channels, n, m[i].kernel_size, m[i].stride, bias=m[i].bias is not None)
 
 
 @contextmanager