diff --git a/src/vnet/classify/classify.api b/src/vnet/classify/classify.api
index de9de77..9d666ee 100644
--- a/src/vnet/classify/classify.api
+++ b/src/vnet/classify/classify.api
@@ -90,8 +90,13 @@
            2: Classified IP packets will be looked up from the
               specified ipv6 fib table (configured by metadata as VRF id).
               Only valid for L3 input ACL node
+           3: Classified packet will be steered to source routig policy
+              of given index (in metadata).
+              This is only valid for IPv6 packets redirected to a source
+              routing node.
     @param metadata - valid only if action != 0
            VRF id if action is 1 or 2.
+           sr policy index if action is 3.
     @param match[] - for add, match value for session, required
 */
 autoreply define classify_add_del_session