diff --git a/core/dns.go b/core/dns.go
index d8011925..2067ea3a 100644
--- a/core/dns.go
+++ b/core/dns.go
@@ -52,7 +52,7 @@ func (d *DNS) query(url string, result *Result) {
 	m.SetQuestion(d.QueryName, queryType)
 	r, _, err := c.Exchange(m, url)
 	if err != nil {
-		result.Errors = append(result.Errors, err.Error())
+		result.AddError(err.Error())
 		return
 	}
 	result.Connected = true
diff --git a/core/service.go b/core/service.go
index 5545dc9d..067ea26c 100644
--- a/core/service.go
+++ b/core/service.go
@@ -195,7 +195,7 @@ func (service *Service) call(result *Result) {
 	} else if isServiceStartTLS {
 		result.Connected, certificate, err = client.CanPerformStartTLS(strings.TrimPrefix(service.URL, "starttls://"), service.Insecure)
 		if err != nil {
-			result.Errors = append(result.Errors, err.Error())
+			result.AddError(err.Error())
 			return
 		}
 		result.Duration = time.Since(startTime)