diff --git a/user-guide/putty.md b/user-guide/putty.md
index 79726c2d..2debe245 100644
--- a/user-guide/putty.md
+++ b/user-guide/putty.md
@@ -17,8 +17,8 @@ Note that you need also to remove the tick at "Attempt GSSAPI key exchange" beca
 ![Working AFS](putty/working_kerberos_ticket_delegation.png)
 
 ## Long Running Programs/Simulations
-The delegated Kerberos ticket from Windows can only be renewed for less than one day. So at some point after AFS will refuse access.
+The delegated Kerberos ticket from Windows can only work for less than one day (in the `klist` output check below `krbtgt/D.PSI.CH@D.PSI.CH` the `renew until` timestamp). So at some point after AFS will refuse access.
 
 To get a longer valid Kerberos ticket on the Linux machine, type `kinit` and authenticate yourself with your password. The newly acquired Kerberos ticket can renewed for one week and AFS is happy as long too. 
 
-Alternatively you my disable Kerberos/GSSAPI authentication in Putty altogehter. But then you need always to enter your password when connecting to your Linux machine. But it will then always get a new Kerberos ticket renewable for one week.
+Alternatively you my disable Kerberos/GSSAPI authentication in Putty altogehter. But then you need always to enter your password when connecting to your Linux machine. But it will then always get a new Kerberos ticket working for one week.