diff --git a/onnxruntime/core/providers/dml/OperatorAuthorHelper/MLOperatorAuthorPrivate.h b/onnxruntime/core/providers/dml/OperatorAuthorHelper/MLOperatorAuthorPrivate.h
index 8a740c9794..4c8730d063 100644
--- a/onnxruntime/core/providers/dml/OperatorAuthorHelper/MLOperatorAuthorPrivate.h
+++ b/onnxruntime/core/providers/dml/OperatorAuthorHelper/MLOperatorAuthorPrivate.h
@@ -5,7 +5,6 @@
 
 interface IDMLOperation;
 interface IDMLOperator;
-enum DML_TENSOR_DATA_TYPE;
 struct DML_OPERATOR_DESC;
 
 struct MLOperatorKernelDmlProperties