diff --git a/subprojects/memcard/include/memcard/country_code.hpp b/subprojects/memcard/include/memcard/country_code.hpp
index 2973482..2532f68 100644
--- a/subprojects/memcard/include/memcard/country_code.hpp
+++ b/subprojects/memcard/include/memcard/country_code.hpp
@@ -18,6 +18,7 @@
 #pragma once
 
 #include <string>
+#include <cstdint>
 
 namespace mc::psx {
 enum class CountryCode : uint16_t {