diff --git a/array_api_compat/common/_helpers.py b/array_api_compat/common/_helpers.py
index 4d808e4b..434e7d87 100644
--- a/array_api_compat/common/_helpers.py
+++ b/array_api_compat/common/_helpers.py
@@ -776,7 +776,7 @@ def to_device(x: Array, device: Device, /, *, stream: Optional[Union[int, Any]]
     device : Hardware device the array data resides on.
 
     """
-    if is_numpy_array(x) or is_ndonnx_array(x):
+    if is_numpy_array(x):
         if stream is not None:
             raise ValueError("The stream argument to to_device() is not supported")
         if device == 'cpu':