diff --git a/beepy-symbol-overlay/src/PSF.hpp b/beepy-symbol-overlay/src/PSF.hpp
index 5a8d6ce..775010c 100644
--- a/beepy-symbol-overlay/src/PSF.hpp
+++ b/beepy-symbol-overlay/src/PSF.hpp
@@ -1,6 +1,7 @@
 #pragma once

 #include <memory>
+#include <cstdint>
 #include <unordered_map>

 class PSF
