diff --git a/doc/aerospike.rst b/doc/aerospike.rst
index 9bdddbcb9..1db5681fe 100644
--- a/doc/aerospike.rst
+++ b/doc/aerospike.rst
@@ -858,6 +858,13 @@ Specifies the TTL constants.
 
     Do not change the current TTL of the record.
 
+.. data:: TTL_CLIENT_DEFAULT
+
+    NOTE: only applies to the policies mentioned below.
+
+    Use the applicable client policy ttl in write, operate, batch write, and scan policies.
+    If the policy is not defined for the transaction, use the default client-level policy's ttl.
+
 .. _auth_mode:
 
 Auth Mode Constants