diff --git a/internal/engine/experiment/smtp/smtp.go b/internal/engine/experiment/smtp/smtp.go
index d97446c..568db04 100644
--- a/internal/engine/experiment/smtp/smtp.go
+++ b/internal/engine/experiment/smtp/smtp.go
@@ -230,7 +230,7 @@ func (r *TCPRunner) resolve(host string) ([]string, bool) {
 	addrs, err := resolver.LookupHost(r.ctx, host)
 	r.tk.Queries = append(r.tk.Queries, r.trace.DNSLookupsFromRoundTrip()...)
 	if err != nil {
-		r.global_error(err)
+		r.tk.Failure = *tracex.NewFailure(err)
 		return []string{}, false
 	}
 	r.logger.Infof("Finished DNS for %s: %v", host, addrs)