diff --git a/radio/src/targets/taranis/board_taranis.h b/radio/src/targets/taranis/board_taranis.h
index 7a2f5cff5..f1d9985f2 100644
--- a/radio/src/targets/taranis/board_taranis.h
+++ b/radio/src/targets/taranis/board_taranis.h
@@ -306,6 +306,7 @@ void audioEnd(void) ;
 void dacStart(void);
 void dacStop(void);
 void setSampleRate(uint32_t frequency);
+extern const int8_t volumeScale[];
 #define VOLUME_LEVEL_MAX  23
 #define VOLUME_LEVEL_DEF  12
 void setVolume(uint8_t volume);