diff --git a/apps/base/matrix/database.yaml b/apps/base/matrix/database.yaml
index 6548f8486357bb9cd589ffe5391243d966d0e9c2..1fe7d481066ed6f27ba105baa25a25bbf23ebb5b 100644
--- a/apps/base/matrix/database.yaml
+++ b/apps/base/matrix/database.yaml
@@ -53,6 +53,11 @@ spec:
         value: "true"
       - name: PG_EXPORTER_CONSTANT_LABELS
         value: 'release=$(CLUSTER_NAME),namespace=$(POD_NAMESPACE)'
+      - name: CLUSTER_NAME
+        valueFrom:
+          fieldRef:
+            apiVersion: v1
+            fieldPath: metadata.labels['cluster-name']
 ---
 apiVersion: monitoring.coreos.com/v1
 kind: PodMonitor