--- a/dom/media/platforms/wmf/DXVA2Manager.cpp
+++ b/dom/media/platforms/wmf/DXVA2Manager.cpp
@@ -878,17 +878,16 @@ D3D11DXVA2Manager::CreateOutputSample(Re
 
 HRESULT
 D3D11DXVA2Manager::CopyToImage(IMFSample* aVideoSample,
                                const nsIntRect& aRegion,
                                Image** aOutImage)
 {
   NS_ENSURE_TRUE(aVideoSample, E_POINTER);
   NS_ENSURE_TRUE(aOutImage, E_POINTER);
-  NS_ENSURE_TRUE(mSyncObject, E_FAIL);
   MOZ_ASSERT(mTextureClientAllocator);
 
   RefPtr<D3D11ShareHandleImage> image =
     new D3D11ShareHandleImage(gfx::IntSize(mWidth, mHeight), aRegion);
   bool ok = image->AllocateTexture(mTextureClientAllocator, mDevice);
   NS_ENSURE_TRUE(ok, E_FAIL);
 
   RefPtr<TextureClient> client = image->GetTextureClient(ImageBridgeChild::GetSingleton().get());
@@ -898,16 +897,18 @@ D3D11DXVA2Manager::CopyToImage(IMFSample
   HRESULT hr;
   RefPtr<ID3D11Texture2D> texture = image->GetTexture();
 
   texture->QueryInterface((IDXGIKeyedMutex**)getter_AddRefs(mutex));
 
   if (mutex) {
     hr = mutex->AcquireSync(0, 2000);
     NS_ENSURE_TRUE(SUCCEEDED(hr), hr);
+  } else {
+    NS_ENSURE_TRUE(mSyncObject, E_FAIL);
   }
 
   if (client && client->GetFormat() == SurfaceFormat::NV12) {
     // Our video frame is stored in a non-sharable ID3D11Texture2D. We need
     // to create a copy of that frame as a sharable resource, save its share
     // handle, and put that handle into the rendering pipeline.
 
     RefPtr<IMFMediaBuffer> buffer;