diff --git a/python/torch_mlir/extras/onnx_importer.py b/python/torch_mlir/extras/onnx_importer.py
index 9e5bc373ebd3..0fa998c5a3ef 100644
--- a/python/torch_mlir/extras/onnx_importer.py
+++ b/python/torch_mlir/extras/onnx_importer.py
@@ -745,7 +745,7 @@ def _sanitize_name(self, name):
 
         # Remove characters that are invalid in MLIR identifier names.
         # https://mlir.llvm.org/docs/LangRef/#identifiers-and-keywords
-        return re.sub("[^\w\.]", "_", name)
+        return re.sub(r"[^\w\.]", "_", name)
 
     def tensor_proto_to_attr(self, tp: onnx.TensorProto) -> Attribute:
         tensor_type = self.tensor_proto_to_builtin_type(tp)