1 files changed, 1 insertions, 1 deletions
diff --git a/boot.php b/boot.php
index b9c03b1ae..50c880113 100644
--- a/boot.php
+++ b/boot.php
@@ -1403,7 +1403,7 @@ function x($s, $k = null) {
  * @ref include/system_unavailable.php will handle everything further.
  */
 function system_unavailable() {
-	include('include/system_unavailable.php');
+	require_once('include/system_unavailable.php');
 	system_down();
 	killme();
 }