diff --git a/y2012/joystick_reader.cc b/y2012/joystick_reader.cc
index 50052c7..eb8c787 100644
--- a/y2012/joystick_reader.cc
+++ b/y2012/joystick_reader.cc
@@ -1,8 +1,9 @@
-#include <math.h>
-#include <stdio.h>
-#include <string.h>
 #include <unistd.h>
 
+#include <cmath>
+#include <cstdio>
+#include <cstring>
+
 #include "aos/actions/actions.h"
 #include "aos/events/shm_event_loop.h"
 #include "aos/init.h"