diff --git a/charts/argo-cd/templates/argocd-application-controller/prometheusrule.yaml b/charts/argo-cd/templates/argocd-application-controller/prometheusrule.yaml
index 34014127..8d104f40 100644
--- a/charts/argo-cd/templates/argocd-application-controller/prometheusrule.yaml
+++ b/charts/argo-cd/templates/argocd-application-controller/prometheusrule.yaml
@@ -13,7 +13,9 @@ metadata:
     app.kubernetes.io/managed-by: {{ .Release.Service }}
     app.kubernetes.io/part-of: argocd
     app.kubernetes.io/component: {{ .Values.controller.name }}
+    {{- if .Values.controller.metrics.rules.selector }}
 {{- toYaml .Values.controller.metrics.rules.selector | nindent 4 }}
+    {{- end }}
     {{- if .Values.controller.metrics.rules.additionalLabels }}
 {{- toYaml .Values.controller.metrics.rules.additionalLabels | nindent 4 }}
     {{- end }}
@@ -22,4 +24,4 @@ spec:
   - name: argocd
     rules:
 {{- toYaml .Values.controller.metrics.rules.spec | nindent 4 }}
-{{- end }}
\ No newline at end of file
+{{- end }}