diff --git a/ggsn/cmdline.ggo b/ggsn/cmdline.ggo
index 5d3e601..c4d281d 100644
--- a/ggsn/cmdline.ggo
+++ b/ggsn/cmdline.ggo
@@ -27,3 +27,7 @@
 
 option  "apn"         a "Access point name"             string default="internet" no
 option  "qos"         q "Requested quality of service"  int    default="0x0b921f" no
+
+option  "ipup"        - "Script to run after link-up"    string no
+option  "ipdown"      - "Script to run after link-down"  string no
+