diff --git a/stable/prometheus-operator/Chart.yaml b/stable/prometheus-operator/Chart.yaml
index f902f8d316..b0cbe39981 100644
--- a/stable/prometheus-operator/Chart.yaml
+++ b/stable/prometheus-operator/Chart.yaml
@@ -9,7 +9,7 @@ name: prometheus-operator
 sources:
   - https://github.com/coreos/prometheus-operator
   - https://coreos.com/operators/prometheus
-version: 1.5.0
+version: 1.5.1
 appVersion: 0.26.0
 home: https://github.com/coreos/prometheus-operator
 keywords:
diff --git a/stable/prometheus-operator/templates/prometheus/prometheus.yaml b/stable/prometheus-operator/templates/prometheus/prometheus.yaml
index 6f47e7b795..509142e2be 100644
--- a/stable/prometheus-operator/templates/prometheus/prometheus.yaml
+++ b/stable/prometheus-operator/templates/prometheus/prometheus.yaml
@@ -72,6 +72,8 @@ spec:
   serviceMonitorSelector:
     matchLabels:
       release: {{ .Release.Name | quote }}
+{{ else }}
+  serviceMonitorSelector: {}
 {{- end }}
 {{- if .Values.prometheus.prometheusSpec.serviceMonitorNamespaceSelector }}
   serviceMonitorNamespaceSelector: