diff --git a/src/core/quantizer/record_quantizer.h b/src/core/quantizer/record_quantizer.h
index b1095a2..e107eeb 100644
--- a/src/core/quantizer/record_quantizer.h
+++ b/src/core/quantizer/record_quantizer.h
@@ -44,11 +44,10 @@ class RecordQuantizer {
         scale = 254 / std::max(max - min, epsilon);
         bias = -min * scale - 127;
         for (size_t i = 0; i < dim; ++i) {
-          float v = vec[i] * scale + bias;
+          float v = std::round(vec[i] * scale + bias);
           squared_sum += v * v;
           sum += v;
-          (reinterpret_cast<int8_t *>(out))[i] =
-              static_cast<int8_t>(std::round(v));
+          (reinterpret_cast<int8_t *>(out))[i] = static_cast<int8_t>(v);
           int8_sum += (reinterpret_cast<int8_t *>(out))[i];
         }
         extras = reinterpret_cast<float *>(static_cast<int8_t *>(out) + dim);
diff --git a/tests/core/algorithm/hnsw/hnsw_streamer_test.cc b/tests/core/algorithm/hnsw/hnsw_streamer_test.cc
index 3f27f52..47560fd 100644
--- a/tests/core/algorithm/hnsw/hnsw_streamer_test.cc
+++ b/tests/core/algorithm/hnsw/hnsw_streamer_test.cc
@@ -2772,7 +2772,7 @@ TEST_F(HnswStreamerTest, TestFetchVectorCosineInt8Converter) {
   for (size_t i = 0; i < cnt; i++) {
     float add_on = i * 10;
     for (size_t j = 0; j < dim; ++j) {
-      if (j < dim / 4)
+      if (j < 3 * dim / 4)
         vec[j] = fixed_value;
       else
         vec[j] = fixed_value + add_on;
@@ -2812,7 +2812,7 @@ TEST_F(HnswStreamerTest, TestFetchVectorCosineInt8Converter) {
   for (size_t i = 0; i < query_cnt; i++) {
     float add_on = i * 10;
     for (size_t j = 0; j < dim; ++j) {
-      if (j < dim / 4)
+      if (j < 3 * dim / 4)
         vec[j] = fixed_value;
       else
         vec[j] = fixed_value + add_on;