diff --git a/README b/README
index 3e7208345d..291b9a0956 100644
--- a/README
+++ b/README
@@ -214,6 +214,7 @@ euca-create-group -d "group description here" groupname
 
 To add a rule to a group:
 euca-authorize -P tcp -p 22 groupname
+euca-authorize -P icmp -t -1:-1 groupname
 
 To delete a rule from a group:
 euca-revoke -P tcp -p 22 groupname