--- a/gfx/gl/GLBlitHelperD3D.cpp
+++ b/gfx/gl/GLBlitHelperD3D.cpp
@@ -107,17 +107,17 @@ public:
             mSuccess &= bool(mStreams[i]);
         }
 
         if (mSuccess) {
             for (uint8_t i = 0; i < mNumPlanes; i++) {
                 MOZ_ALWAYS_TRUE( egl.fStreamConsumerAcquireKHR(display, mStreams[i]) );
 
                 auto& mutex = mMutexList[i];
-                texD3DList[i]->QueryInterface(_uuidof(IDXGIKeyedMutex),
+                texD3DList[i]->QueryInterface(IID_IDXGIKeyedMutex,
                                               (void**)getter_AddRefs(mutex));
                 if (mutex) {
                     const auto hr = mutex->AcquireSync(0, 100);
                     if (FAILED(hr)) {
                         NS_WARNING("BindAnglePlanes failed to acquire KeyedMutex.");
                         mSuccess = false;
                     }
                 }