diff --git a/admin/functions/functions.filters.php b/admin/functions/functions.filters.php
index 4d6ea38..5ce9718 100644
--- a/admin/functions/functions.filters.php
+++ b/admin/functions/functions.filters.php
@@ -23,7 +23,7 @@ function of_filter_save_media_upload($data) {
     if(!is_array($data)) return $data;
     
     foreach ($data as $key => $value) {
-        if (is_string($value)) {
+        if (is_string($value) && preg_match("/\[site_url(_url_secure)?\]/", $value)) {
             $data[$key] = str_replace(
                 array(
                     site_url('', 'http'),