diff --git a/include/fmt/chrono.h b/include/fmt/chrono.h
index ee5a8c27..848d3722 100644
--- a/include/fmt/chrono.h
+++ b/include/fmt/chrono.h
@@ -579,8 +579,7 @@ struct chrono_formatter {
   void write(Rep value, int width) {
     write_sign();
     if (isnan(value)) return write_nan();
-    typedef typename int_traits<int>::main_type main_type;
-    main_type n = to_unsigned(
+    uint32_or_64_t<int> n = to_unsigned(
         to_nonnegative_int(value, (std::numeric_limits<int>::max)()));
     int num_digits = internal::count_digits(n);
     if (width > num_digits) out = std::fill_n(out, width - num_digits, '0');
diff --git a/include/fmt/format-inl.h b/include/fmt/format-inl.h
index b60149fa..2343575b 100644
--- a/include/fmt/format-inl.h
+++ b/include/fmt/format-inl.h
@@ -157,8 +157,7 @@ FMT_FUNC void format_error_code(internal::buffer<char>& out, int error_code,
   static const char ERROR_STR[] = "error ";
   // Subtract 2 to account for terminating null characters in SEP and ERROR_STR.
   std::size_t error_code_size = sizeof(SEP) + sizeof(ERROR_STR) - 2;
-  typedef internal::int_traits<int>::main_type main_type;
-  main_type abs_value = static_cast<main_type>(error_code);
+  auto abs_value = static_cast<uint32_or_64_t<int>>(error_code);
   if (internal::is_negative(error_code)) {
     abs_value = 0 - abs_value;
     ++error_code_size;
diff --git a/include/fmt/format.h b/include/fmt/format.h
index 44389e8e..62418fb3 100644
--- a/include/fmt/format.h
+++ b/include/fmt/format.h
@@ -606,12 +606,11 @@ FMT_CONSTEXPR bool is_negative(T) {
   return false;
 }
 
-template <typename T> struct int_traits {
-  // Smallest of uint32_t and uint64_t that is large enough to represent
-  // all values of T.
-  using main_type =
-      conditional_t<std::numeric_limits<T>::digits <= 32, uint32_t, uint64_t>;
-};
+// Smallest of uint32_t and uint64_t that is large enough to represent all
+// values of T.
+template <typename T>
+using uint32_or_64_t =
+    conditional_t<std::numeric_limits<T>::digits <= 32, uint32_t, uint64_t>;
 
 // Static data is placed in this class template for the header-only config.
 template <typename T = void> struct FMT_EXTERN_TEMPLATE_API basic_data {
@@ -1273,8 +1272,7 @@ template <typename Range> class basic_writer {
 
   // Writes a decimal integer.
   template <typename Int> void write_decimal(Int value) {
-    typedef typename internal::int_traits<Int>::main_type main_type;
-    main_type abs_value = static_cast<main_type>(value);
+    auto abs_value = static_cast<uint32_or_64_t<Int>>(value);
     bool is_negative = internal::is_negative(value);
     if (is_negative) abs_value = 0 - abs_value;
     int num_digits = internal::count_digits(abs_value);
@@ -1286,7 +1284,7 @@ template <typename Range> class basic_writer {
 
   // The handle_int_type_spec handler that writes an integer.
   template <typename Int, typename Spec> struct int_writer {
-    typedef typename internal::int_traits<Int>::main_type unsigned_type;
+    using unsigned_type = uint32_or_64_t<Int>;
 
     basic_writer<Range>& writer;
     const Spec& spec;
diff --git a/include/fmt/printf.h b/include/fmt/printf.h
index c2e9f9bf..fbca84ad 100644
--- a/include/fmt/printf.h
+++ b/include/fmt/printf.h
@@ -158,8 +158,7 @@ template <typename Char> class printf_width_handler {
 
   template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
   unsigned operator()(T value) {
-    typedef typename internal::int_traits<T>::main_type UnsignedType;
-    UnsignedType width = static_cast<UnsignedType>(value);
+    auto width = static_cast<uint32_or_64_t<T>>(value);
     if (internal::is_negative(value)) {
       spec_.align_ = ALIGN_LEFT;
       width = 0 - width;