diff --git a/onnxruntime/core/providers/dml/DmlExecutionProvider/src/MLOperatorAuthorImpl.cpp b/onnxruntime/core/providers/dml/DmlExecutionProvider/src/MLOperatorAuthorImpl.cpp
index e150117af4..2c58d5d36d 100644
--- a/onnxruntime/core/providers/dml/DmlExecutionProvider/src/MLOperatorAuthorImpl.cpp
+++ b/onnxruntime/core/providers/dml/DmlExecutionProvider/src/MLOperatorAuthorImpl.cpp
@@ -1945,7 +1945,7 @@ namespace Windows::AI::MachineLearning::Adapter
             ML_CHECK_BOOL(inputIndex < m_inputTensors.size());
             if (sequenceIndex >= m_inputTensors[inputIndex].size())
             {
-                opKernelContextWrapper->m_inputTensors[inputIndex].resize(sequenceIndex+1);
+                opKernelContextWrapper->m_inputTensors[inputIndex].resize(static_cast<size_t>(sequenceIndex)+1);
             }
 
             if (m_inputTensors[inputIndex][sequenceIndex] == nullptr)