Line break in "with specific text in the description" criteria

Hi,

I want to be notified about some Event Log alerts. The description of these alerts contains text like

Source: Microsoft-Windows-Time-Service
Event ID: 50
...

How can I define the line break in the "with specific text in the description" criteria of the subscription (e.g. looking for "Source: Microsoft-Windows-Time-Service\r\nEvent ID: 50")?

Regards
Florian