diff --git a/include/magic_enum.hpp b/include/magic_enum.hpp
index 53e01c0..79f4455 100644
--- a/include/magic_enum.hpp
+++ b/include/magic_enum.hpp
@@ -69,9 +69,11 @@
 #  pragma clang diagnostic push
 #  pragma clang diagnostic ignored "-Wunknown-warning-option"
 #  pragma clang diagnostic ignored "-Wenum-constexpr-conversion"
+#  pragma clang diagnostic ignored "-Wuseless-cast" // suppresses 'static_cast<char_type>('\0')' for char_type = char (common on Linux).
 #elif defined(__GNUC__)
 #  pragma GCC diagnostic push
 #  pragma GCC diagnostic ignored "-Wmaybe-uninitialized" // May be used uninitialized 'return {};'.
+#  pragma GCC diagnostic ignored "-Wuseless-cast" // suppresses 'static_cast<char_type>('\0')' for char_type = char (common on Linux).
 #elif defined(_MSC_VER)
 #  pragma warning(push)
 #  pragma warning(disable : 26495) // Variable 'static_str<N>::chars_' is uninitialized.
diff --git a/include/magic_enum_utility.hpp b/include/magic_enum_utility.hpp
index 42f0ec1..20dda97 100644
--- a/include/magic_enum_utility.hpp
+++ b/include/magic_enum_utility.hpp
@@ -84,7 +84,7 @@ template <typename E, detail::enum_subtype S = detail::subtype_v<E>>
   if (const auto i = enum_index<D, S>(value)) {
     const std::ptrdiff_t index = (static_cast<std::ptrdiff_t>(*i) + n);
     if (index >= 0 && index < count) {
-      return enum_value<D, S>(index);
+      return enum_value<D, S>(static_cast<std::size_t>(index));
     }
   }
   return {};
@@ -98,7 +98,7 @@ template <typename E, detail::enum_subtype S = detail::subtype_v<E>>
   if (const auto i = enum_index<D, S>(value)) {
     const std::ptrdiff_t index = ((((static_cast<std::ptrdiff_t>(*i) + n) % count) + count) % count);
     if (index >= 0 && index < count) {
-      return enum_value<D, S>(index);
+      return enum_value<D, S>(static_cast<std::size_t>(index));
     }
   }
   return MAGIC_ENUM_ASSERT(false), value;
@@ -112,7 +112,7 @@ template <typename E, detail::enum_subtype S = detail::subtype_v<E>>
   if (const auto i = enum_index<D, S>(value)) {
     const std::ptrdiff_t index = (static_cast<std::ptrdiff_t>(*i) - n);
     if (index >= 0 && index < count) {
-      return enum_value<D, S>(index);
+      return enum_value<D, S>(static_cast<std::size_t>(index));
     }
   }
   return {};
@@ -126,7 +126,7 @@ template <typename E, detail::enum_subtype S = detail::subtype_v<E>>
   if (const auto i = enum_index<D, S>(value)) {
     const std::ptrdiff_t index = ((((static_cast<std::ptrdiff_t>(*i) - n) % count) + count) % count);
     if (index >= 0 && index < count) {
-      return enum_value<D, S>(index);
+      return enum_value<D, S>(static_cast<std::size_t>(index));
     }
   }
   return MAGIC_ENUM_ASSERT(false), value;