diff --git a/cpu/6502/6502def.h b/cpu/6502/6502def.h
index 29c239293..17dd3b650 100644
--- a/cpu/6502/6502def.h
+++ b/cpu/6502/6502def.h
@@ -30,7 +30,7 @@
  *
  * Author: Oliver Schmidt <ol.sc@web.de>
  *
- * @(#)$Id: 6502def.h,v 1.23 2010/04/11 20:47:16 oliverschmidt Exp $
+ * @(#)$Id: 6502def.h,v 1.24 2010/05/08 07:25:10 oliverschmidt Exp $
  */
 
 #ifndef __6502DEF_H__
@@ -72,6 +72,8 @@ typedef unsigned short uip_stats_t;
 
 #define LOADER_CONF_ARCH "lib/unload.h"
 
+#define UIP_CONF_PLAIN_BUFFER 1
+
 #if MTU_SIZE
 #define UIP_CONF_BUFFER_SIZE (UIP_LLH_LEN + MTU_SIZE)
 #else /* MTU_SIZE */