diff --git a/internal/winutils/winutils.h b/internal/winutils/winutils.h
index 0db6ec35..838adad6 100644
--- a/internal/winutils/winutils.h
+++ b/internal/winutils/winutils.h
@@ -23,8 +23,10 @@
 #ifndef WINUTILS_H
 #define WINUTILS_H
 
-#include <windows.h>
 #include <stdlib.h>
+#include <stdint.h>
+#include <windows.h>
+#include <psapi.h>
 
 char *
 wcstoutf8(WCHAR *widestr, char *utf8buf, size_t buflen);