diff --git a/presto-docs/src/main/sphinx/security/ldap.rst b/presto-docs/src/main/sphinx/security/ldap.rst
index 849d33b38072f..f1ac73d58f4c0 100644
--- a/presto-docs/src/main/sphinx/security/ldap.rst
+++ b/presto-docs/src/main/sphinx/security/ldap.rst
@@ -102,6 +102,7 @@ Password authentication needs to be configured to use LDAP. Create an
     password-authenticator.name=ldap
     ldap.url=ldaps://ldap-server:636
     ldap.user-bind-pattern=<Refer below for usage>
+    ldap.cache-ttl=2h
 
 ======================================================= ======================================================
 Property                                                Description
@@ -113,6 +114,10 @@ Property                                                Description
                                                         must contain the pattern ``${USER}`` which will be
                                                         replaced by the actual username during the password
                                                         authentication. Example: ``${USER}@corp.example.com``.
+``ldap.cache-ttl``                                      The time to cache the password authentication. This
+                                                        property must be specified using a string, Example: 
+                                                        Use ``45s`` to set this property to 45 seconds.
+                                                        Default value is ``1.00h`` (1 hour).
 ======================================================= ======================================================
 
 Based on the LDAP server implementation type, the property
diff --git a/presto-password-authenticators/src/main/java/com/facebook/presto/password/LdapConfig.java b/presto-password-authenticators/src/main/java/com/facebook/presto/password/LdapConfig.java
index 426d299f154d9..903d9540d2f8c 100644
--- a/presto-password-authenticators/src/main/java/com/facebook/presto/password/LdapConfig.java
+++ b/presto-password-authenticators/src/main/java/com/facebook/presto/password/LdapConfig.java
@@ -92,6 +92,7 @@ public Duration getLdapCacheTtl()
     }
 
     @Config("ldap.cache-ttl")
+    @ConfigDescription("The time to cache the password authentication. Example: 2.00h")
     public LdapConfig setLdapCacheTtl(Duration ldapCacheTtl)
     {
         this.ldapCacheTtl = ldapCacheTtl;