diff --git a/SeedDMS_Preview/Preview/Previewer.php b/SeedDMS_Preview/Preview/Previewer.php
index b9ed617ac..23c5a97de 100644
--- a/SeedDMS_Preview/Preview/Previewer.php
+++ b/SeedDMS_Preview/Preview/Previewer.php
@@ -57,9 +57,10 @@ class SeedDMS_Preview_Previewer extends SeedDMS_Preview_Base {
 			return false;
 
 		$document = $object->getDocument();
+		$dms = $document->_dms;
 		$dir = $this->previewDir.'/'.$document->getDir();
 		switch(get_class($object)) {
-			case "SeedDMS_Core_DocumentContent":
+			case $dms->getClassname('documentcontent'):
 				$target = $dir.'p'.$object->getVersion().'-'.$width;
 				break;
 			case "SeedDMS_Core_DocumentFile":
diff --git a/SeedDMS_Preview/package.xml b/SeedDMS_Preview/package.xml
index e446eaf34..2afd6da7b 100644
--- a/SeedDMS_Preview/package.xml
+++ b/SeedDMS_Preview/package.xml
@@ -11,10 +11,10 @@
   <email>uwe@steinmann.cx</email>
   <active>yes</active>
  </lead>
- <date>2018-01-18</date>
+ <date>2018-03-08</date>
  <time>10:59:39</time>
  <version>
-  <release>1.2.7</release>
+  <release>1.2.8</release>
   <api>1.2.0</api>
  </version>
  <stability>
@@ -23,9 +23,7 @@
  </stability>
  <license uri="http://opensource.org/licenses/gpl-license">GPL License</license>
  <notes>
-add SeedDMS_Preview_Base::sendFile() as a replacement for readfile() which uses
-mod_xsendfile if available
-execWithTimeout() reads data from stderr and returns it together with stdout in array
+preview is also created if SeedDMS_Core_DocumentContent has a child class
  </notes>
  <contents>
   <dir baseinstalldir="SeedDMS" name="/">
@@ -354,5 +352,23 @@ SeedDMS_Preview_Base::setConverters() overrides existing converters.
 New method SeedDMS_Preview_Base::addConverters() merges new converters with old ones.
    </notes>
   </release>
+  <release>
+   <date>2018-01-18</date>
+   <time>10:59:39</time>
+   <version>
+    <release>1.2.7</release>
+    <api>1.2.0</api>
+   </version>
+   <stability>
+    <release>stable</release>
+    <api>stable</api>
+   </stability>
+   <license uri="http://opensource.org/licenses/gpl-license">GPL License</license>
+   <notes>
+add SeedDMS_Preview_Base::sendFile() as a replacement for readfile() which uses
+mod_xsendfile if available
+execWithTimeout() reads data from stderr and returns it together with stdout in array
+   </notes>
+  </release>
  </changelog>
 </package>