diff --git a/moto/rds2/models.py b/moto/rds2/models.py
index 68acef0a0..aae708cdd 100644
--- a/moto/rds2/models.py
+++ b/moto/rds2/models.py
@@ -216,7 +216,7 @@ class Database(BaseModel):
               <ReadReplicaSourceDBInstanceIdentifier>{{ database.source_db_identifier }}</ReadReplicaSourceDBInstanceIdentifier>
               {% endif %}
               <Engine>{{ database.engine }}</Engine>
-              <IAMDatabaseAuthenticationEnabled>{{database.iam_database_authentication_enabled }}</IAMDatabaseAuthenticationEnabled>
+              <IAMDatabaseAuthenticationEnabled>{{database.enable_iam_database_authentication|lower }}</IAMDatabaseAuthenticationEnabled>
               <LicenseModel>{{ database.license_model }}</LicenseModel>
               <EngineVersion>{{ database.engine_version }}</EngineVersion>
               <OptionGroupMemberships>