SSRS where-clause with value that contains an @

In SSRS 2005 we have a query in a dataset and the query filters on a certain value which happens to contain an @. Eg: select * from test where testfield = '@LC'. SSRS thinks this value s开发者_运维知识库hould be a parameter and treats it that way. How can configure my query so that SSRS treats it as a fixed value? Thanks!

Already tried with '[@]LC'