diff --git a/invokeai/backend/image_util/lineart_anime.py b/invokeai/backend/image_util/lineart_anime.py
index 5185d92c51..33d16bb361 100644
--- a/invokeai/backend/image_util/lineart_anime.py
+++ b/invokeai/backend/image_util/lineart_anime.py
@@ -98,7 +98,7 @@ class UnetSkipConnectionBlock(nn.Module):
         """
         super(UnetSkipConnectionBlock, self).__init__()
         self.outermost = outermost
-        if type(norm_layer) == functools.partial:
+        if isinstance(norm_layer, functools.partial):
             use_bias = norm_layer.func == nn.InstanceNorm2d
         else:
             use_bias = norm_layer == nn.InstanceNorm2d