diff --git a/python/torch_mlir/extras/fx_importer.py b/python/torch_mlir/extras/fx_importer.py
index 24bda3f5b2c6..9acf4ad03a77 100644
--- a/python/torch_mlir/extras/fx_importer.py
+++ b/python/torch_mlir/extras/fx_importer.py
@@ -1849,7 +1849,8 @@ def _emit_operation(
 
 # Opaque value to indicate something is empty. Used in cases where 'None'
 # may have a different meaning.
-class EmptyType: ...
+class EmptyType:
+    ...
 
 
 Empty = EmptyType()