diff --git a/Apollo/api/application/config/constants.php b/Apollo/api/application/config/constants.php
index 9c545f67..dc2b43b8 100755
--- a/Apollo/api/application/config/constants.php
+++ b/Apollo/api/application/config/constants.php
@@ -129,6 +129,7 @@ defined('DAYBOOKMASTER') OR define('DAYBOOKMASTER','T_DayBookMaster');
 defined('INCOMEOUTCOMEMASTER') OR define('INCOMEOUTCOMEMASTER','T_Income_Outcome_Master');
 defined('FEES_INSTALLMENT') OR define('FEES_INSTALLMENT','T_Fees_Installments');
 defined('CENTER') OR define('CENTER','T_CenterMaster');
+defined('SESSIONMASTER') OR define('SESSIONMASTER','T_Session_Master');