diff --git a/drivers/net/mmnif.c b/drivers/net/mmnif.c
index 907b4768..3f3df57b 100644
--- a/drivers/net/mmnif.c
+++ b/drivers/net/mmnif.c
@@ -24,6 +24,7 @@
 #include <lwip/tcpip.h>		/* tcpip_input()*/
 
 #define DEBUG_MMNIF
+#define DEBUG_MMNIF_PACKET
 
 #ifdef DEBUG_MMNIF
 #include "util.h"			/* hex dump */