diff --git a/jsonnet/kube-prometheus/components/alertmanager.libsonnet b/jsonnet/kube-prometheus/components/alertmanager.libsonnet
index 5e992176..27f4ff1b 100644
--- a/jsonnet/kube-prometheus/components/alertmanager.libsonnet
+++ b/jsonnet/kube-prometheus/components/alertmanager.libsonnet
@@ -82,7 +82,7 @@ function(params) {
     kind: 'PrometheusRule',
     metadata: {
       labels: am.config.commonLabels + am.config.mixin.ruleLabels,
-      name: am.config.name + '-rules',
+      name: 'alertmanager-' + am.config.name + '-rules',
       namespace: am.config.namespace,
     },
     spec: {
diff --git a/manifests/alertmanager-prometheusRule.yaml b/manifests/alertmanager-prometheusRule.yaml
index 1fa9c223..52799d3c 100644
--- a/manifests/alertmanager-prometheusRule.yaml
+++ b/manifests/alertmanager-prometheusRule.yaml
@@ -8,7 +8,7 @@ metadata:
     app.kubernetes.io/version: 0.21.0
     prometheus: k8s
     role: alert-rules
-  name: main-rules
+  name: alertmanager-main-rules
   namespace: monitoring
 spec:
   groups: