Incorrect link in solution emails

We have notifications set up for new solutions with the below default email template:

Dear Technician,

Solution : $SolutionId under $TopicName, has been approved.

Title of the solution: $Title

Solution can be viewed using the link below.

$SolutionLink

The link ^ that is sent in the email is wrong. You get an error when you click on the link (below)

If I navigate to the solution in help desk the address is http://ithelpdesk/AddSolution.do?solID=98, so the link in the email has an additional :80 added. How do I change the address that is sent by the &SolutionLink variable to remove this?

Link from the email:

http://ithelpdesk:80/AddSolution.do?solID=98

Error:

HTTP Status 400 - Invalid path /http:/ithelpdesk:80/AddSolution was requested

type Status report

message Invalid path /http:/ithelpdesk:80/AddSolution was requested

description The request sent by the client was syntactically incorrect (Invalid path /http:/ithelpdesk:80/AddSolution was requested).