diff --git a/lwip/src/include/arch/cc.h b/lwip/src/include/arch/cc.h
index c189d2ef..4bd1070e 100644
--- a/lwip/src/include/arch/cc.h
+++ b/lwip/src/include/arch/cc.h
@@ -52,12 +52,12 @@ typedef signed     int     s32_t;
 typedef size_t mem_ptr_t;
 
 /* Define (sn)printf formatters for these lwIP types */
-#define U16_F "u"
-#define S16_F "d"
-#define X16_F "x"
-#define U32_F "u"
-#define S32_F "d"
-#define X32_F "x"
+#define U16_F "hu"
+#define S16_F "hd"
+#define X16_F "hx"
+#define U32_F "lu"
+#define S32_F "ld"
+#define X32_F "lx"
 
 /* Compiler hints for packing structures */
 //#define PACK_STRUCT_FIELD(x) x __attribute__((packed))
diff --git a/lwip/src/include/lwipopts.h b/lwip/src/include/lwipopts.h
index fd0e0b26..5ef58054 100644
--- a/lwip/src/include/lwipopts.h
+++ b/lwip/src/include/lwipopts.h
@@ -31,4 +31,16 @@
  */
 #define LWIP_TCP		1
 
+/* DEBUG options */
+#define LWIP_DEBUG		1
+#define DHCP_DEBUG		LWIP_DBG_ON
+#define ETHARP_DEBUG		LWIP_DBG_ON
+#define TCPIP_DEBUG		LWIP_DBG_ON
+#define SYS_DEBUG		LWIP_DBG_ON
+#define RAW_DEBUG		LWIP_DBG_ON
+#define MEM_DEBUG		LWIP_DBG_ON
+#define IP_DEBUG		LWIP_DBG_ON
+#define INET_DEBUG		LWIP_DBG_ON
+#define NETIF_DEBUG		LWIP_DBG_ON
+
 #endif