diff --git a/blog/index.php b/blog/index.php
index 430cbbf61ef..0d8f7bfa6c0 100755
--- a/blog/index.php
+++ b/blog/index.php
@@ -20,7 +20,7 @@ $limit = optional_param('limit', 0, PARAM_INT);
 $start = optional_param('formstart', 0, PARAM_INT);
 $userid = optional_param('userid',0,PARAM_INT);
 $courseid = optional_param('courseid',SITEID,PARAM_INT);
-$tag = s(urldecode(optional_param('tag', '', PARAM_NOTAGS)));
+$tag = optional_param('tag', '', PARAM_NOTAGS);
 $tagid = optional_param('tagid', 0, PARAM_INT);
 $postid = optional_param('postid',0,PARAM_INT);
 $filtertype = optional_param('filtertype', '', PARAM_ALPHA);