diff --git a/armsrc/em4x50.h b/armsrc/em4x50.h
index f9f1375f2..71e1371f6 100644
--- a/armsrc/em4x50.h
+++ b/armsrc/em4x50.h
@@ -22,5 +22,6 @@ void em4x50_write(em4x50_data_t *etd);
 void em4x50_write_password(em4x50_data_t *etd);
 void em4x50_read(em4x50_data_t *etd);
 void em4x50_wipe(em4x50_data_t *etd);
+void em4x50_bruteforce(em4x50_data_t *etd);
 
 #endif /* EM4X50_H */