diff --git a/phpseclib/Net/SFTP.php b/phpseclib/Net/SFTP.php
index da4c0294..c6c2ea33 100644
--- a/phpseclib/Net/SFTP.php
+++ b/phpseclib/Net/SFTP.php
@@ -3041,6 +3041,10 @@ class Net_SFTP extends Net_SSH2
      */
     function _send_sftp_packet($type, $data, $request_id = 1)
     {
+        // in SSH2.php the timeout is cumulative per function call. eg. exec() will
+        // timeout after 10s. but for SFTP.php it's cumulative per packet
+        $this->curTimeout = $this->timeout;
+
         $packet = $this->use_request_id ?
             pack('NCNa*', strlen($data) + 5, $type, $request_id, $data) :
             pack('NCa*', strlen($data) + 1, $type, $data);