diff --git a/src/sound_type.h b/src/sound_type.h
--- a/src/sound_type.h
+++ b/src/sound_type.h
@@ -21,6 +21,7 @@ struct SoundEntry {
 	uint8 channels;
 	uint8 volume;
 	uint8 priority;
+	byte grf_container_ver; ///< NewGRF container version if the sound is from a NewGRF.
 };
 
 enum SoundFx {