diff --git a/y2018/joystick_reader.cc b/y2018/joystick_reader.cc
index b5df79a..42620ff 100644
--- a/y2018/joystick_reader.cc
+++ b/y2018/joystick_reader.cc
@@ -1,9 +1,9 @@
 #include <google/protobuf/stubs/stringprintf.h>
-#include <math.h>
-#include <stdio.h>
-#include <string.h>
 #include <unistd.h>
 
+#include <cmath>
+#include <cstdio>
+#include <cstring>
 #include <mutex>
 
 #include "aos/actions/actions.h"