diff --git a/content/runbooks/prometheus-operator/PrometheusOperatorNotReady.md b/content/runbooks/prometheus-operator/PrometheusOperatorNotReady.md
index d2f5ec5..b587bc8 100644
--- a/content/runbooks/prometheus-operator/PrometheusOperatorNotReady.md
+++ b/content/runbooks/prometheus-operator/PrometheusOperatorNotReady.md
@@ -7,7 +7,7 @@ weight: 20
 
 ## Meaning
 
-Prometheus operator not ready
+Prometheus operator is not ready.
 
 ## Impact