--- a/widget/windows/nsWindowGfx.cpp
+++ b/widget/windows/nsWindowGfx.cpp
@@ -536,16 +536,17 @@ bool nsWindow::OnPaint(HDC aDC, uint32_t
             Invalidate();
           } else {
             result = listener->PaintWindow(this, region);
           }
         }
         break;
 #endif
       case LayersBackend::LAYERS_CLIENT:
+        gfxWindowsPlatform::GetPlatform()->UpdateRenderMode();
         result = listener->PaintWindow(this, region);
         break;
       default:
         NS_ERROR("Unknown layers backend used!");
         break;
     }
   }