diff --git a/winml/adapter/winml_adapter_dml.cpp b/winml/adapter/winml_adapter_dml.cpp
index 25ce5a13ee..c3cfe12f3d 100644
--- a/winml/adapter/winml_adapter_dml.cpp
+++ b/winml/adapter/winml_adapter_dml.cpp
@@ -130,6 +130,8 @@ ORT_API_STATUS_IMPL(winmla::DmlCreateGPUAllocationFromD3DResource, _In_ ID3D12Re
   API_IMPL_BEGIN
 #ifdef USE_DML
   *dml_resource = Dml::CreateGPUAllocationFromD3DResource(pResource);
+#else
+  *dml_resource = nullptr;
 #endif  // USE_DML USE_DML
   return nullptr;
   API_IMPL_END
@@ -144,6 +146,8 @@ ORT_API_STATUS_IMPL(winmla::DmlGetD3D12ResourceFromAllocation, _In_ OrtExecution
           dml_provider_internal->GetAllocator(0, ::OrtMemType::OrtMemTypeDefault).get(),
           allocation);
   (*d3d_resource)->AddRef();
+#else
+  *d3d_resource = nullptr;
 #endif  // USE_DML USE_DML
   return nullptr;
   API_IMPL_END
diff --git a/winml/adapter/winml_adapter_session.cpp b/winml/adapter/winml_adapter_session.cpp
index 746b449986..ea2cfc65ce 100644
--- a/winml/adapter/winml_adapter_session.cpp
+++ b/winml/adapter/winml_adapter_session.cpp
@@ -195,6 +195,8 @@ ORT_API_STATUS_IMPL(winmla::CreateCustomRegistry, _Out_ IMLOperatorRegistry** re
 #ifdef USE_DML
   auto impl = wil::MakeOrThrow<winmla::AbiCustomRegistryImpl>();
   *registry = impl.Detach();
+#else
+  *registry = nullptr;
 #endif  // USE_DML
   return nullptr;
   API_IMPL_END
diff --git a/winml/lib/Api.Image/D3DDeviceCache.cpp b/winml/lib/Api.Image/D3DDeviceCache.cpp
index 32a0a839ac..b793dfacf7 100644
--- a/winml/lib/Api.Image/D3DDeviceCache.cpp
+++ b/winml/lib/Api.Image/D3DDeviceCache.cpp
@@ -309,11 +309,11 @@ ID3D12RootSignature* D3DDeviceCache::GetTensorizeRootSignature() {
 
     // Compute root signature.
     {
-      CD3DX12_DESCRIPTOR_RANGE1 ranges[2];
+      CD3DX12_DESCRIPTOR_RANGE1 ranges[2] = {};
       ranges[0].Init(D3D12_DESCRIPTOR_RANGE_TYPE_SRV, 1, 0, 0, D3D12_DESCRIPTOR_RANGE_FLAG_DESCRIPTORS_VOLATILE);
       ranges[1].Init(D3D12_DESCRIPTOR_RANGE_TYPE_UAV, 1, 0, 0, D3D12_DESCRIPTOR_RANGE_FLAG_DATA_VOLATILE);
 
-      CD3DX12_ROOT_PARAMETER1 rootParameters[3];
+      CD3DX12_ROOT_PARAMETER1 rootParameters[3] = {};
       rootParameters[0].InitAsConstants(4, 0);
       rootParameters[1].InitAsDescriptorTable(1, &ranges[0], D3D12_SHADER_VISIBILITY_ALL);
       rootParameters[2].InitAsDescriptorTable(1, &ranges[1], D3D12_SHADER_VISIBILITY_ALL);
@@ -354,11 +354,11 @@ ID3D12RootSignature* D3DDeviceCache::GetDetensorizeRootSignature() {
 
     // Compute root signature.
     {
-      CD3DX12_DESCRIPTOR_RANGE1 ranges[2];
+      CD3DX12_DESCRIPTOR_RANGE1 ranges[2] = {};
       ranges[0].Init(D3D12_DESCRIPTOR_RANGE_TYPE_SRV, 1, 0, 0, D3D12_DESCRIPTOR_RANGE_FLAG_DESCRIPTORS_VOLATILE);
       ranges[1].Init(D3D12_DESCRIPTOR_RANGE_TYPE_UAV, 1, 0, 0, D3D12_DESCRIPTOR_RANGE_FLAG_DATA_VOLATILE);
 
-      CD3DX12_ROOT_PARAMETER1 rootParameters[3];
+      CD3DX12_ROOT_PARAMETER1 rootParameters[3] = {};
       rootParameters[0].InitAsConstants(4, 0);
       rootParameters[1].InitAsDescriptorTable(1, &ranges[0], D3D12_SHADER_VISIBILITY_ALL);
       rootParameters[2].InitAsDescriptorTable(1, &ranges[1], D3D12_SHADER_VISIBILITY_ALL);
diff --git a/winml/test/adapter/AdapterSessionTest.cpp b/winml/test/adapter/AdapterSessionTest.cpp
index 9dc7dee188..436eca32e3 100644
--- a/winml/test/adapter/AdapterSessionTest.cpp
+++ b/winml/test/adapter/AdapterSessionTest.cpp
@@ -161,7 +161,7 @@ void LoadAndPurloinModel(const UniqueOrtSession& session, const std::string& mod
 
   winrt::com_ptr<_winml::IOnnxruntimeModel> onnxruntime_model;
   WINML_EXPECT_NO_THROW(onnxruntime_model = model.as<_winml::IOnnxruntimeModel>());
-  OrtModel* ort_model;
+  OrtModel* ort_model = nullptr;
   WINML_EXPECT_HRESULT_SUCCEEDED(onnxruntime_model->DetachOrtModel(&ort_model));
   THROW_IF_NOT_OK_MSG(winml_adapter_api->SessionLoadAndPurloinModel(session.get(), ort_model), ort_api);
 }
@@ -182,7 +182,7 @@ void Initialize() {
 
   winrt::com_ptr<_winml::IOnnxruntimeModel> onnxruntime_model;
   WINML_EXPECT_NO_THROW(onnxruntime_model = model.as<_winml::IOnnxruntimeModel>());
-  OrtModel* ort_model;
+  OrtModel* ort_model = nullptr;
   WINML_EXPECT_HRESULT_SUCCEEDED(onnxruntime_model->DetachOrtModel(&ort_model));
   THROW_IF_NOT_OK_MSG(winml_adapter_api->SessionLoadAndPurloinModel(session.get(), ort_model), ort_api);