diff --git a/platform/c++11/platform.h b/platform/c++11/platform.h
index 2c80e0b..4fbc6d0 100644
--- a/platform/c++11/platform.h
+++ b/platform/c++11/platform.h
@@ -28,6 +28,7 @@
 
 #include <mutex>
 #include <condition_variable>
+#include <chrono>
 
 #include "nsync_cpp.h"