diff --git a/includes/common.inc b/includes/common.inc
index 4376fa6854d..497e82f790f 100644
--- a/includes/common.inc
+++ b/includes/common.inc
@@ -105,7 +105,7 @@ function drupal_rebuild_path_map() {
 
 function drupal_not_found() {
   header("HTTP/1.0 404 Not Found");
-  watchdog("httpd", "404 error: ". $_GET['q'] ." not found");
+  watchdog("httpd", "404 error: '". check_query($_GET["q"]) ."' not found");
 
   $path = drupal_get_normal_path(variable_get('site_404', ''));