diff --git a/firmware/include/_ansi.h b/firmware/include/_ansi.h
index 449001f74d..00028169c0 100644
--- a/firmware/include/_ansi.h
+++ b/firmware/include/_ansi.h
@@ -73,5 +73,6 @@
 #endif
 
 #define ATTRIBUTE_PRINTF(fmt, arg1) _ATTRIBUTE( ( format( printf, fmt, arg1 ) ) )
+#define ATTRIBUTE_SCANF(fmt, arg1) _ATTRIBUTE( ( format( scanf, fmt, arg1 ) ) )
 
 #endif /* _ANSIDECL_H_ */