diff --git a/include/func.hpp b/include/func.hpp
index 854a2f7..25ccba7 100644
--- a/include/func.hpp
+++ b/include/func.hpp
@@ -2,6 +2,7 @@
 #define FUNC_HPP
 
 #include <string>
+#include <cstdint>
 
 class Buffer;