Index: lib/builtins/enable_execute_stack.c
===================================================================
--- lib/builtins/enable_execute_stack.c
+++ lib/builtins/enable_execute_stack.c
@@ -22,7 +22,7 @@
 
 #ifdef _WIN32
 #define WIN32_LEAN_AND_MEAN
-#include <Windows.h>
+#include <windows.h>
 #else
 #ifndef __APPLE__
 #include <unistd.h>