diff --git a/README.md b/README.md
index 3b2b218c..b781c664 100644
--- a/README.md
+++ b/README.md
@@ -339,6 +339,7 @@ domain: internal
 descriptors:
   - key: ldap
     rate_limit:
+      unit: second
       unlimited: true
 
   - key: azure