diff --git a/assets/prometheus/alerts.yaml b/assets/prometheus/alerts.yaml
index ffbff5b..3f7f61b 100644
--- a/assets/prometheus/alerts.yaml
+++ b/assets/prometheus/alerts.yaml
@@ -213,6 +213,16 @@ groups:
     for: 15m
     labels:
       severity: warning
+  - alert: PrometheusTargetSyncFailure
+    annotations:
+      description: '{{ printf "%.0f" $value }} targets in Prometheus {{$labels.instance}}
+        have failed to sync because invalid configuration was supplied.'
+      summary: Prometheus has failed to sync targets.
+    expr: |
+      increase(prometheus_target_sync_failed_total{job="prometheus"}[30m]) > 0
+    for: 5m
+    labels:
+      severity: critical
   - alert: PrometheusErrorSendingAlertsToAnyAlertmanager
     annotations:
       description: '{{ printf "%.1f" $value }}% minimum errors while sending alerts
diff --git a/site/content/prometheus/_index.md b/site/content/prometheus/_index.md
index e178801..32cd3ef 100644
--- a/site/content/prometheus/_index.md
+++ b/site/content/prometheus/_index.md
@@ -314,6 +314,21 @@ labels:
   severity: warning
 {{< /code >}}
  
+##### PrometheusTargetSyncFailure
+
+{{< code lang="yaml" >}}
+alert: PrometheusTargetSyncFailure
+annotations:
+  description: '{{ printf "%.0f" $value }} targets in Prometheus {{$labels.instance}}
+    have failed to sync because invalid configuration was supplied.'
+  summary: Prometheus has failed to sync targets.
+expr: |
+  increase(prometheus_target_sync_failed_total{job="prometheus"}[30m]) > 0
+for: 5m
+labels:
+  severity: critical
+{{< /code >}}
+ 
 ##### PrometheusErrorSendingAlertsToAnyAlertmanager
 '{{ printf "%.1f" $value }}% minimum errors while sending alerts from
 Prometheus encounters more than 3% errors sending alerts to any Alertmanager.