diff --git a/y2016/vision/target_receiver.cc b/y2016/vision/target_receiver.cc
index cc9f41b..a762e4f 100644
--- a/y2016/vision/target_receiver.cc
+++ b/y2016/vision/target_receiver.cc
@@ -1,10 +1,10 @@
 #include <netdb.h>
-#include <stdlib.h>
 #include <unistd.h>
 
 #include <array>
 #include <atomic>
 #include <chrono>
+#include <cstdlib>
 #include <limits>
 #include <memory>
 #include <thread>