diff --git a/firmware/export/jz4740-codec.h b/firmware/export/jz4740-codec.h
index c98bfba602..37d2347f5b 100644
--- a/firmware/export/jz4740-codec.h
+++ b/firmware/export/jz4740-codec.h
@@ -24,4 +24,6 @@
 #define VOLUME_MIN -730
 #define VOLUME_MAX  60
 
+void audiohw_set_volume(int v);
+
 #endif /* __JZ4740_CODEC_H_ */