diff --git a/manual-lookup.php b/manual-lookup.php
index 855267ba23..78b0eed38f 100644
--- a/manual-lookup.php
+++ b/manual-lookup.php
@@ -15,6 +15,10 @@
 
 if (!empty($_GET['scope']) && is_string($_GET['scope'])) {
     $scope = htmlspecialchars($_GET['scope'], ENT_QUOTES, 'UTF-8');
+
+    if ($scope == '404quickref') {
+        status_header(404);
+    }
 } else {
     $scope = '';
 }
diff --git a/results.php b/results.php
index a13f1d28b6..6cde699a26 100644
--- a/results.php
+++ b/results.php
@@ -3,6 +3,14 @@
 $_SERVER['BASE_PAGE'] = 'results.php';
 include __DIR__ . '/include/prepend.inc';
 
+if (!empty($_GET['p']) && is_string($_GET['p'])) {
+    $show = htmlspecialchars($_GET['p'], ENT_QUOTES, 'UTF-8');
+
+    if ($show == '404manual') {
+        status_header(404);
+    }
+}
+
 // HTTP status line is passed on, signifies an error
 site_header(
     'Search results',