diff --git a/inc/query_monitor/class-output-html.php b/inc/query_monitor/class-output-html.php
index 7a69549..7f613da 100644
--- a/inc/query_monitor/class-output-html.php
+++ b/inc/query_monitor/class-output-html.php
@@ -42,7 +42,7 @@ public function output() {
 						<ol class="qm-toggler">
 							<?php echo $this->build_toggler() ?>
 							<div class="qm-toggled">
-								<pre><?php esc_html( print_r( $trace, true ) ) ?></pre>
+								<pre><?php echo esc_html( print_r( $trace, true ) ) ?></pre>
 							</div>
 						</ol>
 					</td>