diff --git a/xlsxwriter.class.php b/xlsxwriter.class.php
index a987735f8..3e33b3ca9 100644
--- a/xlsxwriter.class.php
+++ b/xlsxwriter.class.php
@@ -663,10 +663,11 @@ protected function buildWorkbookXML()
 		}
 		$workbook_xml.='</sheets>';
 		$workbook_xml.='<definedNames>';
+		$i=0;
 		foreach($this->sheets as $sheet_name=>$sheet) {
 			if ($sheet->auto_filter) {
 				$sheetname = self::sanitize_sheetname($sheet->sheetname);
-				$workbook_xml.='<definedName name="_xlnm._FilterDatabase" localSheetId="0" hidden="1">\''.self::xmlspecialchars($sheetname).'\'!$A$1:' . self::xlsCell($sheet->row_count - 1, count($sheet->columns) - 1, true) . '</definedName>';
+				$workbook_xml.='<definedName name="_xlnm._FilterDatabase" localSheetId="'.$i.'" hidden="1">\''.self::xmlspecialchars($sheetname).'\'!$A$1:' . self::xlsCell($sheet->row_count - 1, count($sheet->columns) - 1, true) . '</definedName>';
 				$i++;	
 			}
 		}