diff --git a/include/onnxruntime/core/providers/dml/dml_provider_factory.h b/include/onnxruntime/core/providers/dml/dml_provider_factory.h
index 071e7f0251..f55c4c09fa 100644
--- a/include/onnxruntime/core/providers/dml/dml_provider_factory.h
+++ b/include/onnxruntime/core/providers/dml/dml_provider_factory.h
@@ -1,6 +1,8 @@
 // Copyright (c) Microsoft Corporation. All rights reserved.
 // Licensed under the MIT License.
 
+#pragma once
+
 #pragma warning(push)
 #pragma warning(disable : 4201) // nonstandard extension used: nameless struct/union
 #include <d3d12.h>
@@ -44,4 +46,4 @@ ORT_API_STATUS(OrtSessionOptionsAppendExecutionProviderEx_DML, _In_ OrtSessionOp
 
 #ifdef __cplusplus
 }
-#endif
\ No newline at end of file
+#endif