diff --git a/search2/indexing/extractors/OpenXmlTextExtractor.inc.php b/search2/indexing/extractors/OpenXmlTextExtractor.inc.php
index abba3d7..209b62c 100644
--- a/search2/indexing/extractors/OpenXmlTextExtractor.inc.php
+++ b/search2/indexing/extractors/OpenXmlTextExtractor.inc.php
@@ -198,8 +198,9 @@ class OpenXmlTextExtractor extends ExternalDocumentExtractor
 		{
 			$filename = substr($filename,1);
 		}
+		$filename = str_replace('\\','/',$filename);
 
-		$cmd = $this->unzip . ' ' . str_replace(
+		$cmd = '"' .$this->unzip . '"' . ' ' . str_replace(
 			array('{source}','{part}', '{target_dir}'),
 			array($this->sourcefile, $filename,$this->openxml_dir), $this->unzip_params);