diff --git a/include/nlohmann/detail/hash.hpp b/include/nlohmann/detail/hash.hpp
index c32d5535c..12706a7fd 100644
--- a/include/nlohmann/detail/hash.hpp
+++ b/include/nlohmann/detail/hash.hpp
@@ -1,6 +1,7 @@
 #pragma once
 
-#include <cstddef> // size_t, uint8_t
+#include <cstdint> // uint8_t
+#include <cstddef> // size_t
 #include <functional> // hash
 
 #include <nlohmann/detail/macro_scope.hpp>
diff --git a/single_include/nlohmann/json.hpp b/single_include/nlohmann/json.hpp
index df4112927..a02c29d19 100644
--- a/single_include/nlohmann/json.hpp
+++ b/single_include/nlohmann/json.hpp
@@ -4663,7 +4663,8 @@ class byte_container_with_subtype : public BinaryType
 // #include <nlohmann/detail/hash.hpp>
 
 
-#include <cstddef> // size_t, uint8_t
+#include <cstdint> // uint8_t
+#include <cstddef> // size_t
 #include <functional> // hash
 
 // #include <nlohmann/detail/macro_scope.hpp>