diff --git a/phpgwapi/inc/class.mime_magic.inc.php b/phpgwapi/inc/class.mime_magic.inc.php
index 3f4a937310..4dae27f6ae 100644
--- a/phpgwapi/inc/class.mime_magic.inc.php
+++ b/phpgwapi/inc/class.mime_magic.inc.php
@@ -32,7 +32,7 @@ class mime_magic
 	 * @param string $mime
 	 * @return string
 	 */
-	public function mime2label($mime)
+	public static function mime2label($mime)
 	{
 		$mime = strtolower($mime);