diff --git a/include/fmt/format-inl.h b/include/fmt/format-inl.h
index 29b94717..0fd719b4 100644
--- a/include/fmt/format-inl.h
+++ b/include/fmt/format-inl.h
@@ -1790,7 +1790,7 @@ bool check_divisibility_and_divide_by_pow5(uint32_t& n) FMT_NOEXCEPT {
 template <int N> uint32_t small_division_by_pow10(uint32_t n) FMT_NOEXCEPT {
   static constexpr struct {
     uint32_t magic_number;
-    uint32_t shift_amount;
+    int shift_amount;
     uint32_t divisor_times_10;
   } infos[] = {{0xcccd, 19, 100}, {0xa3d8, 22, 1000}};
   constexpr auto info = infos[N - 1];