diff --git a/Apollo/api/application/config/constants.php b/Apollo/api/application/config/constants.php
index 727d80a3..7c64fd6e 100755
--- a/Apollo/api/application/config/constants.php
+++ b/Apollo/api/application/config/constants.php
@@ -132,6 +132,7 @@ defined('CENTER') OR define('CENTER','T_CenterMaster');
 defined('SUBJECTMASTER') OR define('SUBJECTMASTER','T_SubjectMaster');
 defined('SESSIONMASTER') OR define('SESSIONMASTER','T_Session_Master');
 defined('SESSIONDETAILS') OR define('SESSIONDETAILS','T_SessionDetails');
+defined('COURSESUBJECT') OR define('COURSESUBJECT','T_CourseSubject_Details');