diff --git a/onnxruntime/python/tools/quantization/base_quantizer.py b/onnxruntime/python/tools/quantization/base_quantizer.py
index 7bf8b2846d73b..9838d118a7bd7 100644
--- a/onnxruntime/python/tools/quantization/base_quantizer.py
+++ b/onnxruntime/python/tools/quantization/base_quantizer.py
@@ -41,7 +41,7 @@ def __init__(self, **data: dict[str, Any]):
         for k, v in data.items():
             if not isinstance(k, str):
                 raise TypeError(f"Keys must be strings not {type(k)} for k={k!r}.")
-            if k != "axis" and not isinstance(v, (int, str, np.ndarray)):
+            if k != "axis" and not isinstance(v, (int, str, np.ndarray, float)):
                 raise TypeError(f"Values must be numpy arrays, int, float, str not {type(v)} for k={k!r}.")
             if k == "axis" and not isinstance(v, int) and v is not None:
                 raise TypeError(f"Axis value must be an int or None, not {type(v)}.")