diff --git a/presentation/lookAndFeel/knowledgeTree/administration/doccheckoutmanagement/editDocCheckoutUI.inc b/presentation/lookAndFeel/knowledgeTree/administration/doccheckoutmanagement/editDocCheckoutUI.inc
index 273679f..a356584 100644
--- a/presentation/lookAndFeel/knowledgeTree/administration/doccheckoutmanagement/editDocCheckoutUI.inc
+++ b/presentation/lookAndFeel/knowledgeTree/administration/doccheckoutmanagement/editDocCheckoutUI.inc
@@ -43,7 +43,7 @@ function getEditCheckoutPage($fDocumentID){
 	$sToRender .= "<table>\n";
 	$sToRender .= "<tr><td colspan=\"2\">Are you sure you want to Check In the document:</tr></td>";
 	$sToRender .= "<tr><td width=\"20%\">Path</td><td><b>" . $oDocument->getDisplayPath() . "</b></td></tr>";
-	 $sToRender .= "<tr><td>Checked Out By</td><td><b>" . $oUser->getName() . "</b></td></tr>";
+	$sToRender .= "<tr><td>Checked Out By</td><td><b>" . ($oUser ? $oUser->getName() : "Unknown" ) . "</b></td></tr>";
  	$sToRender .= "<input type=\"hidden\" name=\"fUpdate\" value=\"1\">\n";
  	$sToRender .= "<input type=\"hidden\" name=\"fDocumentID\" value=\"$fDocumentID\">\n";
 	$sToRender .= "<tr>\n";