diff --git a/src/dawn_native/d3d12/DeviceD3D12.cpp b/src/dawn_native/d3d12/DeviceD3D12.cpp
index 2f535ee6ec..4c6eb3bbad 100644
--- a/src/dawn_native/d3d12/DeviceD3D12.cpp
+++ b/src/dawn_native/d3d12/DeviceD3D12.cpp
@@ -40,10 +40,6 @@
 
 namespace dawn_native { namespace d3d12 {
 
-    void ASSERT_SUCCESS(HRESULT hr) {
-        ASSERT(SUCCEEDED(hr));
-    }
-
     Device::Device(Adapter* adapter, const DeviceDescriptor* descriptor)
         : DeviceBase(adapter, descriptor) {
         if (descriptor != nullptr) {
diff --git a/src/dawn_native/d3d12/DeviceD3D12.h b/src/dawn_native/d3d12/DeviceD3D12.h
index e5a373480c..a856d10ada 100644
--- a/src/dawn_native/d3d12/DeviceD3D12.h
+++ b/src/dawn_native/d3d12/DeviceD3D12.h
@@ -33,7 +33,11 @@ namespace dawn_native { namespace d3d12 {
     class PlatformFunctions;
     class ResourceAllocator;
 
-    void ASSERT_SUCCESS(HRESULT hr);
+#define ASSERT_SUCCESS(hr)            \
+    {                                 \
+        HRESULT succeeded = hr;       \
+        ASSERT(SUCCEEDED(succeeded)); \
+    }
 
     // Definition of backend types
     class Device : public DeviceBase {