diff --git a/manifests/monitoring/grafana/dashboards/cluster.json b/manifests/monitoring/grafana/dashboards/cluster.json
index 4fbc7974..871a7c99 100644
--- a/manifests/monitoring/grafana/dashboards/cluster.json
+++ b/manifests/monitoring/grafana/dashboards/cluster.json
@@ -387,7 +387,7 @@
       "type": "row"
     },
     {
-      "datasource": null,
+      "datasource": "${DS_PROMETHEUS}",
       "description": "",
       "fieldConfig": {
         "defaults": {
@@ -499,7 +499,7 @@
       "type": "table"
     },
     {
-      "datasource": null,
+      "datasource": "${DS_PROMETHEUS}",
       "description": "",
       "fieldConfig": {
         "defaults": {