diff --git a/phpseclib/Net/SFTP.php b/phpseclib/Net/SFTP.php
index 046d61da..a5279857 100644
--- a/phpseclib/Net/SFTP.php
+++ b/phpseclib/Net/SFTP.php
@@ -2959,7 +2959,7 @@ class SFTP extends SSH2
         $tempLength-= strlen($this->packet_buffer);
 
         // 256 * 1024 is what SFTP_MAX_MSG_LENGTH is set to in OpenSSH's sftp-common.h
-        if ($tempLength > 256 * 1024) {
+        if (!$this->use_request_id && $tempLength > 256 * 1024) {
             throw new \RuntimeException('Invalid Size');
         }