diff --git a/search2/indexing/extractors/OpenXmlTextExtractor.inc.php b/search2/indexing/extractors/OpenXmlTextExtractor.inc.php
index 6176d75..cb01a12 100644
--- a/search2/indexing/extractors/OpenXmlTextExtractor.inc.php
+++ b/search2/indexing/extractors/OpenXmlTextExtractor.inc.php
@@ -43,7 +43,7 @@ class OpenXmlTextExtractor extends ExternalDocumentExtractor
 		$config = KTConfig::getSingleton();
 
 		$this->unzip = KTUtil::findCommand("import/unzip", 'unzip');
-		$this->unzip_params = $config->get('extractorParameters/unzip', '\'{source}\' \'{part}\' -d \'{target_dir}\'');
+		$this->unzip_params = $config->get('extractorParameters/unzip', '"{source}" "{part}" -d "{target_dir}"');
 		parent::__construct();
 	}
 
diff --git a/search2/indexing/extractors/PSExtractor.inc.php b/search2/indexing/extractors/PSExtractor.inc.php
index 66bfbff..f64104a 100755
--- a/search2/indexing/extractors/PSExtractor.inc.php
+++ b/search2/indexing/extractors/PSExtractor.inc.php
@@ -41,7 +41,7 @@ class PSExtractor extends ApplicationExtractor
 	public function __construct()
 	{
 		$config = KTConfig::getSingleton();
-		$params = $config->get('extractorParameters/pstotext', '\'{source}\' > \'{target}\'');
+		$params = $config->get('extractorParameters/pstotext', '"{source}" > "{target}"');
 
 		parent::__construct('externalBinary','pstotext','pstotext',_kt('PostScript Text Extractor'), $params);
 	}