diff --git a/src/os/unix/ngx_aio_read.c b/src/os/unix/ngx_aio_read.c
index 6c0c400..49602f9 100644
--- a/src/os/unix/ngx_aio_read.c
+++ b/src/os/unix/ngx_aio_read.c
@@ -1,4 +1,9 @@
 
+/*
+ * Copyright (C) 2002-2004 Igor Sysoev
+ */
+
+
 #include <ngx_config.h>
 #include <ngx_core.h>
 #include <ngx_event.h>