diff --git a/prowler/compliance/aws/cis_1.4_aws.json b/prowler/compliance/aws/cis_1.4_aws.json
index da77feb991..584ca284c6 100644
--- a/prowler/compliance/aws/cis_1.4_aws.json
+++ b/prowler/compliance/aws/cis_1.4_aws.json
@@ -584,7 +584,8 @@
       "Id": "2.3.1",
       "Description": "Ensure that encryption is enabled for RDS Instances",
       "Checks": [
-        "rds_instance_storage_encrypted"
+        "rds_instance_storage_encrypted",
+        "rds_instance_transport_encrypted"
       ],
       "Attributes": [
         {