diff --git a/mod/chat/users.php b/mod/chat/users.php
index 9e2dd5269ed..2034611e99c 100644
--- a/mod/chat/users.php
+++ b/mod/chat/users.php
@@ -81,7 +81,7 @@ $str->secs  = get_string("secs");
 /// Get list of users
 
 if (!$chatusers = chat_get_users($chatuser->chatid)) {
-    print_string("errornousers");
+    print_string("errornousers", "chat");
     exit;
 }