diff --git a/helm/prometheus-rules/templates/platform/cabbage/alerting-rules/cilium.rules.yml b/helm/prometheus-rules/templates/platform/cabbage/alerting-rules/cilium.rules.yml
index e674fc2f..fb29bf7c 100644
--- a/helm/prometheus-rules/templates/platform/cabbage/alerting-rules/cilium.rules.yml
+++ b/helm/prometheus-rules/templates/platform/cabbage/alerting-rules/cilium.rules.yml
@@ -63,7 +63,7 @@ spec:
     - alert: FluxHelmReleaseFailed
       annotations:
         description: |-
-          {{`Flux HelmRelease {{ $labels.name }} in ns {{ $labels.exported_namespace }} on {{ $labels.installation }}/{{ $labels.cluster_id }} is stuck in Failed state.`}}
+          {{`Flux HelmRelease {{ $labels.name }} in ns {{ $labels.exported_namespace }} on {{ $labels.installation }}-{{ $labels.cluster_id }} is stuck in Failed state.`}}
         opsrecipe: fluxcd-failing-helmrelease/
       expr: gotk_reconcile_condition{type="Ready", status="False", kind="HelmRelease", cluster_type="management_cluster", exported_namespace!="flux-giantswarm", name=~".*(cilium|network-policies)"} > 0
       for: 20m
diff --git a/helm/prometheus-rules/templates/platform/cabbage/alerting-rules/coredns.rules.yml b/helm/prometheus-rules/templates/platform/cabbage/alerting-rules/coredns.rules.yml
index f67cfb8c..b18b2f29 100644
--- a/helm/prometheus-rules/templates/platform/cabbage/alerting-rules/coredns.rules.yml
+++ b/helm/prometheus-rules/templates/platform/cabbage/alerting-rules/coredns.rules.yml
@@ -29,7 +29,7 @@ spec:
     - alert: FluxHelmReleaseFailed
       annotations:
         description: |-
-          {{`Flux HelmRelease {{ $labels.name }} in ns {{ $labels.exported_namespace }} on {{ $labels.installation }}/{{ $labels.cluster_id }} is stuck in Failed state.`}}
+          {{`Flux HelmRelease {{ $labels.name }} in ns {{ $labels.exported_namespace }} on {{ $labels.installation }}-{{ $labels.cluster_id }} is stuck in Failed state.`}}
         opsrecipe: fluxcd-failing-helmrelease/
       expr: gotk_reconcile_condition{type="Ready", status="False", kind="HelmRelease", cluster_type="management_cluster", exported_namespace!="flux-giantswarm", name=~".*coredns"} > 0
       for: 20m