diff --git a/firmware/target/arm/as3525/ascodec-target.h b/firmware/target/arm/as3525/ascodec-target.h
index 46f6e11d4b..c31a1bab0c 100644
--- a/firmware/target/arm/as3525/ascodec-target.h
+++ b/firmware/target/arm/as3525/ascodec-target.h
@@ -27,6 +27,8 @@
 
 #include "as3514.h"
 
+void ascodec_init(void);
+
 int ascodec_write(unsigned int index, unsigned int value);
 
 int ascodec_read(unsigned int index);