diff --git a/Source/hdd/ApaDefs.h b/Source/hdd/ApaDefs.h
index ae9b5bcc5..8dfbe04c6 100644
--- a/Source/hdd/ApaDefs.h
+++ b/Source/hdd/ApaDefs.h
@@ -1,5 +1,7 @@
 #pragma once
 
+#include <cstdint>
+
 namespace Hdd
 {
 	enum