diff --git a/src/core/ngx_slab.h b/src/core/ngx_slab.h
index 11b249a..0ae7100 100644
--- a/src/core/ngx_slab.h
+++ b/src/core/ngx_slab.h
@@ -1,3 +1,9 @@
+
+/*
+ * Copyright (C) 2002-2004 Igor Sysoev
+ */
+
+
 #ifndef _NGX_SLAB_H_INCLUDED_
 #define _NGX_SLAB_H_INCLUDED_