diff --git a/cpu/6502/6502def.h b/cpu/6502/6502def.h
index 6b87dd86e..ea9d272d5 100644
--- a/cpu/6502/6502def.h
+++ b/cpu/6502/6502def.h
@@ -68,7 +68,6 @@ typedef unsigned short uip_stats_t;
 #define UIP_ARCH_ADD32  1
 #define UIP_ARCH_CHKSUM 1
 
-#define MAC_CONF_CHANNEL_CHECK_RATE          1
 #define NETSTACK_CONF_RDC_CHANNEL_CHECK_RATE 1
 
 #define LOADER_CONF_ARCH "lib/unload.h"