diff --git a/Apollo/api/application/config/constants.php b/Apollo/api/application/config/constants.php
index 4bfca34d..9b7763b2 100755
--- a/Apollo/api/application/config/constants.php
+++ b/Apollo/api/application/config/constants.php
@@ -109,6 +109,10 @@ defined('MC') OR define('MC','MC');
 defined('PC') OR define('PC','PC');
 defined('OTHER') OR define('OTHER','OTHER');
 
+// define default payment type
+defined('WAIVER') OR define('WAIVER','WAIVER');
+defined('REFERRAL') OR define('REFERRAL','REFERRAL');
+
 //encript database table name
 defined('LOGIN') OR define('LOGIN','T_Login');
 defined('BRANCH') OR define('BRANCH','T_BranchMaster');