diff --git a/win32/lib/crt1.c b/win32/lib/crt1.c
index 5e80bd3..0be446f 100644
--- a/win32/lib/crt1.c
+++ b/win32/lib/crt1.c
@@ -2,6 +2,8 @@
 // crt1.c
 
 #include <stdlib.h>
+// For ExitProcess
+#include <windows.h>
 
 #define __UNKNOWN_APP    0
 #define __CONSOLE_APP    1