diff --git a/workflow/engine/config/schema.xml b/workflow/engine/config/schema.xml
index a741cc393..340293fba 100644
--- a/workflow/engine/config/schema.xml
+++ b/workflow/engine/config/schema.xml
@@ -2737,6 +2737,13 @@
         <parameter name="Seq_in_index" value="1"/>
       </vendor>
     </index>
+    <index name="indexDynUid">
+      <index-column name="DYN_UID"/>
+      <vendor type="mysql">
+        <parameter name="Table" value="APP_HISTORY"/>
+        <parameter name="Key_name" value="indexDynUid"/>
+      </vendor>
+    </index>
   </table>
   <table name="APP_FOLDER">
     <vendor type="mysql">
diff --git a/workflow/engine/data/mysql/schema.sql b/workflow/engine/data/mysql/schema.sql
index 2b63de082..edbe9ce73 100644
--- a/workflow/engine/data/mysql/schema.sql
+++ b/workflow/engine/data/mysql/schema.sql
@@ -1306,7 +1306,8 @@ CREATE TABLE `APP_HISTORY`
 	`APP_STATUS` VARCHAR(100) default '' NOT NULL,
 	`HISTORY_DATE` DATETIME,
 	`HISTORY_DATA` MEDIUMTEXT  NOT NULL,
-	KEY `indexAppHistory`(`APP_UID`, `TAS_UID`, `USR_UID`)
+	KEY `indexAppHistory`(`APP_UID`, `TAS_UID`, `USR_UID`),
+	KEY `indexDynUid`(`DYN_UID`)
 )ENGINE=InnoDB  DEFAULT CHARSET='utf8' COMMENT='History table for Dynaforms';
 #-----------------------------------------------------------------------------
 #-- APP_FOLDER