diff --git a/src/openrct2/core/EnumMap.hpp b/src/openrct2/core/EnumMap.hpp
index 7ea7be8d99..8a5811490a 100644
--- a/src/openrct2/core/EnumMap.hpp
+++ b/src/openrct2/core/EnumMap.hpp
@@ -10,6 +10,7 @@
 
 #include <algorithm>
 #include <array>
+#include <cstdint>
 #include <optional>
 #include <string_view>
 #include <vector>
diff --git a/src/openrct2/rct12/EntryList.h b/src/openrct2/rct12/EntryList.h
index a7625b8092..77895bcc7c 100644
--- a/src/openrct2/rct12/EntryList.h
+++ b/src/openrct2/rct12/EntryList.h
@@ -9,6 +9,7 @@
 
 #pragma once
 
+#include <cstdint>
 #include <string>
 #include <string_view>
 #include <vector>