diff --git a/src/tarantool.c b/src/tarantool.c
index b5401aa..5c81b42 100644
--- a/src/tarantool.c
+++ b/src/tarantool.c
@@ -1519,7 +1519,7 @@ io_buf_read_field(struct io_buf *buf, zval *tuple)
 	case sizeof(int64_t):
 		if (!io_buf_read_int64(buf, &i64_val))
 			return false;
-		add_next_index_long(tuple, i32_val);
+		add_next_index_long(tuple, i64_val);
 		break;
 	default:
 		if (!io_buf_read_str(buf, &str_val, field_length))