diff --git a/htdocs/includes/odtphp/odf.php b/htdocs/includes/odtphp/odf.php
index 4a24afafffd..4e4287ae3b6 100644
--- a/htdocs/includes/odtphp/odf.php
+++ b/htdocs/includes/odtphp/odf.php
@@ -44,7 +44,7 @@ class Odf
 	public $userdefined=array();
 
 	const PIXEL_TO_CM = 0.026458333;
-	const FIND_TAGS_REGEX = '/<([A-Za-z]+)(?:\s([A-Za-z]+(?:\-[A-Za-z]+)?(?:=(?:".*?")|(?:[0-9]+))))*(?:(?:\s\/>)|(?:>(.*)<\/\1>))/';
+	const FIND_TAGS_REGEX = '/<([A-Za-z0-9]+)(?:\s([A-Za-z]+(?:\-[A-Za-z]+)?(?:=(?:".*?")|(?:[0-9]+))))*(?:(?:\s\/>)|(?:>(.*)<\/\1>))/';
 	const FIND_ENCODED_TAGS_REGEX = '/&lt;([A-Za-z]+)(?:\s([A-Za-z]+(?:\-[A-Za-z]+)?(?:=(?:".*?")|(?:[0-9]+))))*(?:(?:\s\/&gt;)|(?:&gt;(.*)&lt;\/\1&gt;))/';