diff --git a/tools/compat/db.h b/tools/compat/db.h
index e0ec51f8bcff..fdd5d2851d96 100644
--- a/tools/compat/db.h
+++ b/tools/compat/db.h
@@ -1,5 +1,7 @@
-/*	$NetBSD: db.h,v 1.3 2003/10/27 00:12:43 lukem Exp $	*/
+/*	$NetBSD: db.h,v 1.4 2006/10/16 19:44:23 apb Exp $	*/
 
 #include "nbtool_config.h"
+#ifndef __BIT_TYPES_DEFINED__
 #define __BIT_TYPES_DEFINED__
+#endif
 #include "../../include/db.h"