diff --git a/docs/source/bbsim_config.rst b/docs/source/bbsim_config.rst
index 240ddaa..78146f9 100644
--- a/docs/source/bbsim_config.rst
+++ b/docs/source/bbsim_config.rst
@@ -57,6 +57,8 @@
            IP address:port (default ":50060")
      -pon int
            Number of PON ports per OLT device to be emulated (default 1)
+     -pon_port_config_file string
+        Pon Interfaces Configuration file path
      -pots int
            Number of POTS UNI Ports per ONU device to be emulated (default 0)
      -rest_api_address string