diff --git a/README.md b/README.md
index 86983b7..d62bda4 100644
--- a/README.md
+++ b/README.md
@@ -20,6 +20,7 @@ package main
 import "pndpd/pndp"
 
 pndp.SimpleRespond(iface string, filter []*net.IPNet)
+pndp.ParseFilter(f string) []*net.IPNet
 
 pndp.Proxy(iface1, iface2 string)
 
diff --git a/pndp/process.go b/pndp/process.go
index eb7c612..15aee2b 100644
--- a/pndp/process.go
+++ b/pndp/process.go
@@ -56,13 +56,12 @@ func wgWaitTimout(wg *sync.WaitGroup, timeout time.Duration) bool {
 	}
 }
 
-// SimpleRespond
+// SimpleRespond (Non blocking)
 //
 // iface - The interface to listen to and respond from
 //
-// filter - Optional (can be nil) list of CIDRs to whitelist
-//
-// Non blocking
+// filter - Optional (can be nil) list of CIDRs to whitelist. Must be IPV6!
+// ParseFilter verifies ipv6
 func SimpleRespond(iface string, filter []*net.IPNet) {
 	go simpleRespond(iface, filter)
 }