diff --git a/src/tool_help.c b/src/tool_help.c
index c2318e32ff90e8f9475d9fddfa6182b58d3779eb..cd8b9b443e2dcf66eadd3f6762182896ff079185 100644
--- a/src/tool_help.c
+++ b/src/tool_help.c
@@ -155,6 +155,7 @@ static const char *const helptext[] = {
   "     --no-sessionid  Disable SSL session-ID reusing (SSL)",
   "     --noproxy       List of hosts which do not use proxy",
   "     --ntlm          Use HTTP NTLM authentication (H)",
+  "     --ntlm-wb       Use HTTP NTLM authentication with winbind (H)",
   "     --oauth2-bearer TOKEN  OAuth 2 Bearer Token (IMAP, POP3, SMTP)",
   " -o, --output FILE   Write to FILE instead of stdout",
   "     --pass PASS     Pass phrase for the private key (SSL/SSH)",