diff --git a/ulog_cpp/simple_writer.cpp b/ulog_cpp/simple_writer.cpp
index a4841fb..9da33e6 100644
--- a/ulog_cpp/simple_writer.cpp
+++ b/ulog_cpp/simple_writer.cpp
@@ -6,6 +6,7 @@
 #include "simple_writer.hpp"
 
 #ifdef _WIN32
+#include <windows.h>
 #include <fileapi.h>
 #else
 #include <unistd.h>