diff --git a/workflow/engine/config/schema.xml b/workflow/engine/config/schema.xml
index a2036ea2f..c255993fc 100644
--- a/workflow/engine/config/schema.xml
+++ b/workflow/engine/config/schema.xml
@@ -300,6 +300,12 @@
     <index name="indexAppUid">
       <index-column name="APP_UID"/>
     </index>
+    <index name="indexAppUidDocUidDocVersionDocType">
+      <index-column name="APP_UID"/>
+      <index-column name="DOC_UID"/>
+      <index-column name="DOC_VERSION"/>
+      <index-column name="APP_DOC_TYPE"/>
+    </index>
   </table>
   <table name="APP_MESSAGE" idMethod="native">
     <vendor type="mysql">
diff --git a/workflow/engine/data/mysql/schema.sql b/workflow/engine/data/mysql/schema.sql
index 156fdc2e4..c38fc05b9 100644
--- a/workflow/engine/data/mysql/schema.sql
+++ b/workflow/engine/data/mysql/schema.sql
@@ -133,7 +133,8 @@ CREATE TABLE `APP_DOCUMENT`
 	`SYNC_PERMISSIONS` MEDIUMTEXT,
 	PRIMARY KEY (`APP_DOC_UID`,`DOC_VERSION`),
 	KEY `indexAppDocument`(`FOLDER_UID`, `APP_DOC_UID`),
-	KEY `indexAppUid`(`APP_UID`)
+	KEY `indexAppUid`(`APP_UID`),
+	KEY `indexAppUidDocUidDocVersionDocType`(`APP_UID`, `DOC_UID`, `DOC_VERSION`, `APP_DOC_TYPE`)
 )ENGINE=InnoDB  DEFAULT CHARSET='utf8' COMMENT='Documents in an Application';
 #-----------------------------------------------------------------------------
 #-- APP_MESSAGE