diff --git a/config/notifiers.go b/config/notifiers.go
index d79c8b5057..698c4e3b5d 100644
--- a/config/notifiers.go
+++ b/config/notifiers.go
@@ -78,6 +78,7 @@ var (
 		Description: `{{ template "pagerduty.default.description" .}}`,
 		Client:      `{{ template "pagerduty.default.client" . }}`,
 		ClientURL:   `{{ template "pagerduty.default.clientURL" . }}`,
+		Severity:    `{{ template "pagerduty.default.severity" . }}`,
 	}
 
 	// DefaultSlackConfig defines default values for Slack configurations.
diff --git a/template/default.tmpl b/template/default.tmpl
index 8b2bb7470e..497941b856 100644
--- a/template/default.tmpl
+++ b/template/default.tmpl
@@ -38,6 +38,7 @@ Source: {{ .GeneratorURL }}
 {{ define "pagerduty.default.client" }}{{ template "__alertmanager" . }}{{ end }}
 {{ define "pagerduty.default.clientURL" }}{{ template "__alertmanagerURL" . }}{{ end }}
 {{ define "pagerduty.default.instances" }}{{ template "__text_alert_list" . }}{{ end }}
+{{ define "pagerduty.default.severity" }}{{ if .CommonLabels.severity }}{{ .CommonLabels.severity | toLower }}{{ else }}{{ printf "error" }}{{ end }}{{ end }}
 
 
 {{ define "opsgenie.default.message" }}{{ template "__subject" . }}{{ end }}