diff --git a/src/internal/sio_client_impl.h b/src/internal/sio_client_impl.h
index 577b1dd..735fe50 100644
--- a/src/internal/sio_client_impl.h
+++ b/src/internal/sio_client_impl.h
@@ -4,7 +4,7 @@
 #include <cstdint>
 #ifdef _WIN32
 #define _WEBSOCKETPP_CPP11_THREAD_
-//#define _WEBSOCKETPP_CPP11_RANDOM_DEVICE_
+#define _WEBSOCKETPP_CPP11_RANDOM_DEVICE_
 #define _WEBSOCKETPP_NO_CPP11_FUNCTIONAL_
 #define INTIALIZER(__TYPE__)
 #else