diff --git a/docs/system-monitoring.md b/docs/system-monitoring.md
index ce6de8b36b0b..3cc3089e5796 100644
--- a/docs/system-monitoring.md
+++ b/docs/system-monitoring.md
@@ -53,7 +53,7 @@ Note that it won't clear alerts like "KubeControllerManagerDown" or
 you can get rid of these alerts by modifying them to detect a working component
 like this:
 
-```
+```promql
 absent(apiserver_audit_event_total{job="kube-scheduler"})
 ```