diff --git a/mod/chat/chatd.php b/mod/chat/chatd.php
index f255c17dfd2..caedaa55dda 100644
--- a/mod/chat/chatd.php
+++ b/mod/chat/chatd.php
@@ -1,6 +1,8 @@
 #!/usr/bin/php -q
 <?php
 
+define('CLI_SCRIPT', true);
+
 // Browser quirks
 define('QUIRK_CHUNK_UPDATE', 0x0001);