diff --git a/documentation/prometheus-mixin/alerts.libsonnet b/documentation/prometheus-mixin/alerts.libsonnet
index 97c92cf584..4c66c4a9ba 100644
--- a/documentation/prometheus-mixin/alerts.libsonnet
+++ b/documentation/prometheus-mixin/alerts.libsonnet
@@ -123,8 +123,8 @@
             labels: {
               severity: 'warning',
             },
-            message: {
-              description: "Prometheus {{ $labels.namespace }}/{{ $labels.pod}} isn't ingesting samples.",
+            annotations: {
+              message: "Prometheus {{ $labels.namespace }}/{{ $labels.pod}} isn't ingesting samples.",
             },
           },
           {