diff --git a/lib/moodlelib.php b/lib/moodlelib.php
index 30f599731d2..00d54ab8de0 100644
--- a/lib/moodlelib.php
+++ b/lib/moodlelib.php
@@ -9079,7 +9079,7 @@ function get_performance_info() {
         $info['txt'] .= 'rcache: '.
             "{$rcache->hits}/{$rcache->misses} ";
     }*/
-    $info['html'] = '<div class="performanceinfo">'.$info['html'].'</div>';
+    $info['html'] = '<div class="performanceinfo siteinfo">'.$info['html'].'</div>';
     return $info;
 }
 
diff --git a/lib/outputrenderers.php b/lib/outputrenderers.php
index 0a6153a045a..e27e4c505cc 100644
--- a/lib/outputrenderers.php
+++ b/lib/outputrenderers.php
@@ -355,7 +355,7 @@ class core_renderer extends renderer_base {
             $output .= html_writer::tag('div', get_string('legacythemeinuse'), array('class'=>'legacythemeinuse'));
         }
         if (!empty($CFG->debugpageinfo)) {
-            $output .= '<div class="performanceinfo">This page is: ' . $this->page->debug_summary() . '</div>';
+            $output .= '<div class="performanceinfo pageinfo">This page is: ' . $this->page->debug_summary() . '</div>';
         }
         if (debugging(null, DEBUG_DEVELOPER) and has_capability('moodle/site:config', get_context_instance(CONTEXT_SYSTEM))) {  // Only in developer mode
             $output .= '<div class="purgecaches"><a href="'.$CFG->wwwroot.'/admin/purgecaches.php?confirm=1&amp;sesskey='.sesskey().'">'.get_string('purgecaches', 'admin').'</a></div>';