diff --git a/include/fast_float/ascii_number.h b/include/fast_float/ascii_number.h
index 94abf96..05149bb 100644
--- a/include/fast_float/ascii_number.h
+++ b/include/fast_float/ascii_number.h
@@ -70,7 +70,7 @@ read8_to_u64(UC const *chars) {
 
 #ifdef FASTFLOAT_SSE2
 
-fastfloat_really_inline uint64_t simd_read8_to_u64(__m128i const data) {
+fastfloat_really_inline uint64_t simd_read8_to_u64(__m128i const &data) {
   FASTFLOAT_SIMD_DISABLE_WARNINGS
   // _mm_packus_epi16 is SSE2+, converts 8×u16 → 8×u8
   __m128i const packed = _mm_packus_epi16(data, data);
@@ -94,7 +94,7 @@ fastfloat_really_inline uint64_t simd_read8_to_u64(char16_t const *chars) {
 
 #elif defined(FASTFLOAT_NEON)
 
-fastfloat_really_inline uint64_t simd_read8_to_u64(uint16x8_t const data) {
+fastfloat_really_inline uint64_t simd_read8_to_u64(uint16x8_t const &data) {
   FASTFLOAT_SIMD_DISABLE_WARNINGS
   uint8x8_t utf8_packed = vmovn_u16(data);
   return vget_lane_u64(vreinterpret_u64_u8(utf8_packed), 0);
diff --git a/include/fast_float/float_common.h b/include/fast_float/float_common.h
index 9a56cf3..2801437 100644
--- a/include/fast_float/float_common.h
+++ b/include/fast_float/float_common.h
@@ -179,8 +179,7 @@ using parse_options = parse_options_t<char>;
 #if defined(__SSE2__) || (defined(FASTFLOAT_VISUAL_STUDIO) &&                  \
                           (defined(_M_AMD64) || defined(_M_X64) ||             \
                            (defined(_M_IX86_FP) && _M_IX86_FP == 2)))
-// try to fix error on x86 platform: disable SSE2 code
-// #define FASTFLOAT_SSE2 1
+#define FASTFLOAT_SSE2 1
 #endif
 
 #if defined(__aarch64__) || defined(_M_ARM64)