diff --git a/dev/CSSContentParser.php b/dev/CSSContentParser.php
index 06b8a0770..d68360458 100644
--- a/dev/CSSContentParser.php
+++ b/dev/CSSContentParser.php
@@ -41,7 +41,7 @@ class CSSContentParser extends Object {
 		} elseif(@shell_exec('which tidy')) {
 			// using tiny through cli
 			$CLI_content = escapeshellarg($content);
-			$tidy = `echo $CLI_content | tidy -n -q -utf8 -asxhtml -w 0 2> /dev/null`;
+			$tidy = `echo $CLI_content | tidy --force-output 1 -n -q -utf8 -asxhtml -w 0 2> /dev/null`;
 			$tidy = str_replace('xmlns="http://www.w3.org/1999/xhtml"','',$tidy);
 			$tidy = str_replace(' ','',$tidy);
 		} else {