diff --git a/README.md b/README.md
index eb5a54eb..dbb9b5de 100644
--- a/README.md
+++ b/README.md
@@ -74,6 +74,7 @@ Cmdline options
 * --service=            - 1 if uses system folders (/var/run/i2pd.pid, /var/log/i2pd.log, /var/lib/i2pd).
 * --unreachable=        - 1 if router is declared as unreachable and works through introducers.
 * --v6=                 - 1 if supports communication through ipv6, off by default
+* --floodfill=          - 1 if router is floodfill, off by default
 * --httpproxyport=      - The port to listen on (HTTP Proxy)
 * --socksproxyport=     - The port to listen on (SOCKS Proxy)
 * --ircport=            - The local port of IRC tunnel to listen on. 6668 by default