diff --git a/ydb/library/yql/utils/simd/simd_avx2.h b/ydb/library/yql/utils/simd/simd_avx2.h
index 319e201cdadf..8457df3a6ca4 100644
--- a/ydb/library/yql/utils/simd/simd_avx2.h
+++ b/ydb/library/yql/utils/simd/simd_avx2.h
@@ -78,6 +78,10 @@ struct TSimd8 {
         return crc;
     }
 
+    inline void Add64(const TSimd8<T>& another) {
+        Value = _mm256_add_epi64(Value, another.Value);
+    }
+
     inline int ToBitMask() const {
         return _mm256_movemask_epi8(this->Value);
     }