diff --git a/n2n.h b/n2n.h
index fb4fdca..21473dd 100644
--- a/n2n.h
+++ b/n2n.h
@@ -126,8 +126,12 @@ typedef struct ether_hdr ether_hdr_t;
 #include "n2n_wire.h"
 #include "n2n_transforms.h"
 
-/* N2N_IFNAMSIZ is needed on win32 even if dev_name is not used after declaration */
+#ifdef WIN32
+#define N2N_IFNAMSIZ            64
+#else
 #define N2N_IFNAMSIZ            16 /* 15 chars * NULL */
+#endif
+
 #ifndef WIN32
 typedef struct tuntap_dev {
   int           fd;
diff --git a/win32/wintap.c b/win32/wintap.c
index 4ad91de..3321675 100644
--- a/win32/wintap.c
+++ b/win32/wintap.c
@@ -5,9 +5,6 @@
 #include "../n2n.h"
 #include "n2n_win32.h"
 
-/* 1500 bytes payload + 14 bytes ethernet header + 4 bytes VLAN tag */
-#define MTU 1518
-
 void initWin32() {
   WSADATA wsaData;
   int err;