diff --git a/docs/readme.eng.md b/docs/readme.eng.md
index 9656f5b..24790b8 100644
--- a/docs/readme.eng.md
+++ b/docs/readme.eng.md
@@ -139,7 +139,7 @@ nfqws takes the following parameters:
  --pidfile=<filename>  			; write pid to file
  --user=<username>      		; drop root privs
  --uid=uid[:gid]			; drop root privs
- --dpi-desync=[<mode0,]<mode>[,<mode2>]	; desync dpi state. modes : synack fake rst rstack hopbyhop disorder disorder2 split split2 ipfrag2
+ --dpi-desync=[<mode0,]<mode>[,<mode2>]	; desync dpi state. modes : synack fake rst rstack hopbyhop destopt disorder disorder2 split split2 ipfrag2
  --dpi-desync-fwmark=<int|0xHEX>        ; override fwmark for desync packet. default = 0x40000000
  --dpi-desync-ttl=<int>                 ; set ttl for desync packet
  --dpi-desync-ttl6=<int>                ; set ipv6 hop limit for desync packet. by default ttl value is used