1 files changed, 1 insertions, 1 deletions
diff --git a/ydb/library/yql/public/udf/arrow/block_reader.h b/ydb/library/yql/public/udf/arrow/block_reader.h
index a451486854..3500e0154b 100644
--- a/ydb/library/yql/public/udf/arrow/block_reader.h
+++ b/ydb/library/yql/public/udf/arrow/block_reader.h
@@ -449,7 +449,7 @@ inline void UpdateBlockItemSerializeProps(const ITypeInfoHelper& typeInfoHelper,
     if (typePg) {
         auto desc = typeInfoHelper.FindPgTypeDescription(typePg.GetTypeId());
         if (desc->PassByValue) {
-            *props.MaxSize += desc->Typelen;
+            *props.MaxSize += 1 + desc->Typelen;
         } else {
             props.MaxSize = {};
             props.IsFixed = false;