diff --git a/onnxscript/rewriter/pattern.py b/onnxscript/rewriter/pattern.py
index 6459ae29c..e67650847 100644
--- a/onnxscript/rewriter/pattern.py
+++ b/onnxscript/rewriter/pattern.py
@@ -566,7 +566,7 @@ def match_scalar(self, scalar_value):
         # the Constant node in the return_value list. However, we don't do that.
         # Instead, we will rely on DCE to remove the constant node if it is not
         # used elsewhere.
-        return MatchResult(status)
+        return MatchResult(success=status)
 
     def matches(self, value: ir.Value, model: ir.Model):
         value = _ir_utils.propagate_const_value(value)