diff --git a/www/error.php b/www/error.php
index 4ab5d04..16c2f7c 100644
--- a/www/error.php
+++ b/www/error.php
@@ -2,14 +2,14 @@
 
 require_once __DIR__ . '/../include/init.inc.php';
 
-site_header();
+site_header(['http_response_code' => 404]);
 
 echo '<h2>Error 404</h2>';
 if ($_SERVER['REDIRECT_STATUS'] == 404) {
 	echo '<p>File not found: '.htmlspecialchars($_SERVER['REQUEST_URI']).'</p>';
 }
 else {
-	echo '<p>An error occured</p>';
+	echo '<p>An error occurred</p>';
 }
 
 site_footer();
diff --git a/www/revcheck.php b/www/revcheck.php
index 7d30004..1a3ff1f 100644
--- a/www/revcheck.php
+++ b/www/revcheck.php
@@ -25,17 +25,23 @@
 }
 
 if (!defined('SQLITE_DIR')) {
-    site_header();
+    site_header(['http_response_code' => 500]);
     echo "<p>Unable to find SQLite database with revisions.</p>";
     site_footer();
     die;
 }
 
 $DBLANG = SQLITE_DIR . 'status.sqlite';
+if (!file_exists($DBLANG)) {
+    site_header(['http_response_code' => 500]);
+    echo "<p>Database file doesn't exist</p>";
+    site_footer();
+    die;
+}
 
 $dbhandle = new SQLite3($DBLANG);
 if (!$dbhandle) {
-    site_header();
+    site_header(['http_response_code' => 500]);
     echo "<p>Database connection couldn't be established</p>";
     site_footer();
     die;
@@ -45,7 +51,7 @@
 $lang_intro = get_language_intro($dbhandle, $lang);
 
 if ($lang !== 'en' && is_null($lang_intro)) {
-    site_header();
+    site_header(['http_response_code' => 404]);
     echo "<p>This revision check doesn't exist yet.</p>";
     site_footer();
     die;