diff --git a/database/quexs.sql b/database/quexs.sql
index 62ed5bcd..a9f6b69a 100644
--- a/database/quexs.sql
+++ b/database/quexs.sql
@@ -32,6 +32,7 @@ CREATE TABLE `appointment` (
   PRIMARY KEY  (`appointment_id`),
   KEY `completed_call_id` (`completed_call_id`),
   KEY `call_attempt_id` (`call_attempt_id`)
+  KEY `case_id` (`case_id`)
 ) ENGINE=InnoDB DEFAULT CHARACTER SET utf8 COLLATE utf8_unicode_ci;
 
 --