diff --git a/include/magic_enum.hpp b/include/magic_enum.hpp
index 0afd9e5..cae99ba 100644
--- a/include/magic_enum.hpp
+++ b/include/magic_enum.hpp
@@ -34,6 +34,7 @@
 
 #include <array>
 #include <cassert>
+#include <cstdint>
 #include <cstddef>
 #include <iosfwd>
 #include <limits>