In 1939, "Virage de Ancienne Douane" was eliminated and cut short, thus giving birth to the Eau Rouge/Raidillon uphill sweeping corner.
En 1939, a "Virage de Ancienne Douane" (curva da vella aduana) foi eliminada e recurtada, dando así nacemento á curva costa arriba de Eau Rouge/Raidillon.