diff --git a/_im-plugin/ism/index.md b/_im-plugin/ism/index.md
index 7a2a3da3..5e983e45 100644
--- a/_im-plugin/ism/index.md
+++ b/_im-plugin/ism/index.md
@@ -89,6 +89,7 @@ Make sure that the alias that you enter already exists. For more information abo
 
 After you attach a policy to an index, ISM creates a job that runs every 5 minutes by default to perform policy actions, check conditions, and transition the index into different states. To change the default time interval for this job, see [Settings]({{site.url}}{{site.baseurl}}/im-plugin/ism/settings/).
 
+ISM does not run jobs if the cluster state is red.
 
 ### Step 3: Manage indices