diff --git a/include/misc.php b/include/misc.php
index f1bf0ebf9..b5e54da76 100644
--- a/include/misc.php
+++ b/include/misc.php
@@ -4170,6 +4170,7 @@ function unicode_trim($s) {
 // resources; so we'll accomplish this with generic string processing instead.
 function strip_share_content($str)
 {
+    $output = $str;
     $begin = strpos($str, '[share');
     $end = strrpos($str, '[/share]');
     if ($begin && $end) {