diff --git a/include/fast_float/parse_number.h b/include/fast_float/parse_number.h
index 71989f6..d2b2aaf 100644
--- a/include/fast_float/parse_number.h
+++ b/include/fast_float/parse_number.h
@@ -373,25 +373,17 @@ integer_times_pow10(int64_t mantissa, int decimal_exponent) noexcept {
 
 // the following overloads are here to avoid surprising ambiguity for int,
 // unsigned, etc.
-#if !defined(_MSC_VER)
-FASTFLOAT_CONSTEXPR20 inline double
-integer_times_pow10(unsigned long long mantissa,
-                    int decimal_exponent) noexcept {
+template <typename Int>
+FASTFLOAT_CONSTEXPR20 inline std::enable_if_t<
+    std::is_integral<Int>::value && !std::is_signed<Int>::value, double>
+integer_times_pow10(Int mantissa, int decimal_exponent) noexcept {
   return integer_times_pow10(static_cast<uint64_t>(mantissa), decimal_exponent);
 }
 
-FASTFLOAT_CONSTEXPR20 inline double
-integer_times_pow10(long long mantissa, int decimal_exponent) noexcept {
-  return integer_times_pow10(static_cast<int64_t>(mantissa), decimal_exponent);
-}
-#endif
-FASTFLOAT_CONSTEXPR20 inline double
-integer_times_pow10(unsigned mantissa, int decimal_exponent) noexcept {
-  return integer_times_pow10(static_cast<uint64_t>(mantissa), decimal_exponent);
-}
-
-FASTFLOAT_CONSTEXPR20 inline double
-integer_times_pow10(int mantissa, int decimal_exponent) noexcept {
+template <typename Int>
+FASTFLOAT_CONSTEXPR20 inline std::enable_if_t<
+    std::is_integral<Int>::value && std::is_signed<Int>::value, double>
+integer_times_pow10(Int mantissa, int decimal_exponent) noexcept {
   return integer_times_pow10(static_cast<int64_t>(mantissa), decimal_exponent);
 }