diff --git a/doku.php b/doku.php
index 52e8e6b8e9597db80a96ad2a6fa37389b2867089..052e18be9acef8d7a2cc639a3c30e790448ee5d4 100644
--- a/doku.php
+++ b/doku.php
@@ -61,7 +61,7 @@ if($conf['allowdebug'] && $ACT == 'debug'){
 //send 404 for missing pages if configured or ID has special meaning to bots
 if(!$INFO['exists'] &&
   ($conf['send404'] || preg_match('/^(robots\.txt|sitemap\.xml(\.gz)?|favicon\.ico|crossdomain\.xml)$/',$ID)) &&
-  ($ACT == 'show' || substr($ACT,0,7) == 'export_') ){
+  ($ACT == 'show' || (!is_array($ACT) && substr($ACT,0,7) == 'export_')) ){
     header('HTTP/1.0 404 Not Found');
 }