diff --git a/jsonnet/kube-prometheus/alerts/prometheus.libsonnet b/jsonnet/kube-prometheus/alerts/prometheus.libsonnet
index b188faa22bf2c00dd65f04674a84db44f0dc9308..a2d0cc67af8a56218028193bcd8d037f74c5e83a 100644
--- a/jsonnet/kube-prometheus/alerts/prometheus.libsonnet
+++ b/jsonnet/kube-prometheus/alerts/prometheus.libsonnet
@@ -109,7 +109,7 @@
               summary: 'Prometheus write-ahead log is corrupted',
             },
             expr: |||
-              tsdb_wal_corruptions_total{%(prometheusSelector)s} > 0
+              prometheus_tsdb_wal_corruptions_total{%(prometheusSelector)s} > 0
             ||| % $._config,
             'for': '4h',
             labels: {