--- a/lib/outputrenderers.php
+++ b/lib/outputrenderers.php
@@ -2580,7 +2580,7 @@ class core_renderer extends renderer_base {

         // Then wrap it in link if needed. Also we don't wrap it in link if the link redirects to itself.
         if (!$userpicture->link ||
-                (isset($this->page->url) && $this->page->url == $url)) { // Protect against unset page->url.
+                ($this->page->has_set_url() && $this->page->url == $url)) { // Protect against unset page->url.
             return $output;
         }