diff --git a/include/athena/FileReader.hpp b/include/athena/FileReader.hpp
index 932ce4d..a8205fe 100644
--- a/include/athena/FileReader.hpp
+++ b/include/athena/FileReader.hpp
@@ -2,6 +2,7 @@
 #define FILESTREAM_HPP
 
 #if _WIN32
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #else
 #include <stdio.h>
diff --git a/include/athena/FileWriter.hpp b/include/athena/FileWriter.hpp
index 41ac8d0..8027189 100644
--- a/include/athena/FileWriter.hpp
+++ b/include/athena/FileWriter.hpp
@@ -2,6 +2,7 @@
 #define FILEWRITER_HPP
 
 #if _WIN32
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #else
 #include <stdio.h>