diff --git a/onnxscript/ir/_core.py b/onnxscript/ir/_core.py
index fb113ee835..ddb0e80309 100644
--- a/onnxscript/ir/_core.py
+++ b/onnxscript/ir/_core.py
@@ -199,7 +199,7 @@ def _check_numpy_representation_type(array: np.ndarray, dtype: _enums.DataType)
             )
         if dtype.itemsize == 1 and array.dtype not in (
             np.uint8,
-            ml_dtypes.float8_e4m3b11fnuz,
+            ml_dtypes.float8_e4m3fnuz,
             ml_dtypes.float8_e4m3fn,
             ml_dtypes.float8_e5m2fnuz,
             ml_dtypes.float8_e5m2,