diff --git a/pkg/services/ngalert/sender/sender.go b/pkg/services/ngalert/sender/sender.go
index 1df7315ffd2..e4bb96146ff 100644
--- a/pkg/services/ngalert/sender/sender.go
+++ b/pkg/services/ngalert/sender/sender.go
@@ -182,14 +182,14 @@ func (s *ExternalAlertmanager) SendAlerts(alerts apimodels.PostableAlerts) {
 		na := s.alertToNotifierAlert(a)
 		as = append(as, na)
 
-		s.logger.Debug("msg",
+		s.logger.Debug(
 			"Sending alert",
 			"alert",
-			a,
+			na.String(),
 			"starts_at",
-			a.StartsAt,
+			na.StartsAt,
 			"ends_at",
-			a.EndsAt)
+			na.EndsAt)
 	}
 
 	s.manager.Send(as...)