diff --git a/src/main.cpp b/src/main.cpp
index 867336c57..9506289c3 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -3,6 +3,7 @@
 #include "engine/engine.h"
 
 #ifdef _WIN32
+#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #else
 #include <unistd.h>