diff --git a/htdocs/includes/odtphp/odf.php b/htdocs/includes/odtphp/odf.php
index a1663bea1b1..a7416258a57 100644
--- a/htdocs/includes/odtphp/odf.php
+++ b/htdocs/includes/odtphp/odf.php
@@ -543,8 +543,9 @@ IMG;
 	 */
 	private function _parse($type = 'content')
 	{
-		// Search all tags fou into condition to complete $this->vars, so we will proceed all tests even if not defined
+		// Search all tags found into condition to complete $this->vars, so we will proceed all tests even if not defined
 		$reg='@\[!--\sIF\s([{}a-zA-Z0-9\.\,_]+)\s--\]@smU';
+		$matches = array();
 		preg_match_all($reg, $this->contentXml, $matches, PREG_SET_ORDER);
 
 		//var_dump($this->vars);exit;