diff --git a/include/fast_float/float_common.h b/include/fast_float/float_common.h
index 76de233..2dd450d 100644
--- a/include/fast_float/float_common.h
+++ b/include/fast_float/float_common.h
@@ -465,8 +465,10 @@ umul128_generic(uint64_t ab, uint64_t cd, uint64_t *hi) noexcept {
 
 // slow emulation routine for 32-bit
 #if !defined(__MINGW64__)
-fastfloat_really_inline FASTFLOAT_CONSTEXPR14
-uint64_t_umul128(uint64_t ab, uint64_t cd, uint64_t *hi) noexcept {
+fastfloat_really_inline FASTFLOAT_CONSTEXPR14 uint64_t _umul128(uint64_t ab,
+                                                                uint64_t cd,
+                                                                uint64_t *hi)
+                                                                 noexcept {
   return umul128_generic(ab, cd, hi);
 }
 #endif // !__MINGW64__