1 files changed, 1 insertions, 0 deletions
diff --git a/src/newgrf_sound.h b/src/newgrf_sound.h
index 0d3295327..efded063c 100644
--- a/src/newgrf_sound.h
+++ b/src/newgrf_sound.h
@@ -33,6 +33,7 @@ enum VehicleSoundEvent {
 SoundEntry *AllocateSound(uint num);
 void InitializeSoundPool();
 bool LoadNewGRFSound(SoundEntry *sound);
+SoundID GetNewGRFSoundID(const struct GRFFile *file, SoundID sound_id);
 SoundEntry *GetSound(SoundID sound_id);
 uint GetNumSounds();
 bool PlayVehicleSound(const Vehicle *v, VehicleSoundEvent event);