diff --git a/helm/prometheus-rules/templates/kaas/bigmac/alerting-rules/dex.rules.yml b/helm/prometheus-rules/templates/kaas/bigmac/alerting-rules/dex.rules.yml
index a42ef205b..efc37f478 100644
--- a/helm/prometheus-rules/templates/kaas/bigmac/alerting-rules/dex.rules.yml
+++ b/helm/prometheus-rules/templates/kaas/bigmac/alerting-rules/dex.rules.yml
@@ -41,7 +41,12 @@ spec:
       annotations:
         description: '{{`dex-operator did not register a dex-app in giantswarm namespace.`}}'
         opsrecipe: dex-operator/
+      {{- if .Values.mimir.enabled }}
+      expr: absent(dex_operator_idp_secret_expiry_time{app_namespace="giantswarm", cluster_type="management_cluster", cluster_id="{{ .Values.managementCluster.name }}", installation="{{ .Values.managementCluster.name }}", provider="{{ .Values.managementCluster.provider.kind }}", pipeline="{{ .Values.managementCluster.pipeline }}"})
+      {{- else }}
       expr: absent(dex_operator_idp_secret_expiry_time{app_namespace="giantswarm", cluster_type="management_cluster"}) == 1
+      {{- end }}
+      expr: 
       for: 30m
       labels:
         area: kaas