1 files changed, 1 insertions, 0 deletions
diff --git a/index.php b/index.php
index c379f72d0..aa1df441b 100644
--- a/index.php
+++ b/index.php
@@ -66,6 +66,7 @@ switch (ENVIRONMENT)
 	break;
 
 	default:
+		header('HTTP/1.1 503 Service Unavailable.', TRUE, 503);
 		exit('The application environment is not set correctly.');
 }