problem CreateDomainRecord with linodego

I'm trying to create a new A record in a domain that linode is hosting. The code is in go and using linodego. When I call CreateDomainRecord(), I get back the following error "[tag] tag is not valid". The tag I'm using is eezhee and it has already been created with a call to CreateTag. Does anyone have an idea why I'm getting this error?

recCreateOpts := linodego.DomainRecordCreateOptions{
            Type: linodego.RecordTypeA,
            Name: "www",
            Target: "127.0.0.1",
        }
recCreateOpts.Tag = strCopy("testTag") // can't assign a constant

        newRecord, err := m.api.CreateDomainRecord(context.Background(), checkDomain.ID, recCreateOpts)
if err != nil {
    return err
}