diff --git a/includes/Pager/AbuseFilterHistoryPager.php b/includes/Pager/AbuseFilterHistoryPager.php
index 6ff448a5a..82fa3f1b8 100644
--- a/includes/Pager/AbuseFilterHistoryPager.php
+++ b/includes/Pager/AbuseFilterHistoryPager.php
@@ -79,7 +79,7 @@ class AbuseFilterHistoryPager extends TablePager {
 	public function getFieldNames() {
 		static $headers = null;
 
-		if ( !empty( $headers ) ) {
+		if ( $headers !== null ) {
 			return $headers;
 		}