diff --git a/libportfwd/include/portfwd/portfwd.h b/libportfwd/include/portfwd/portfwd.h
index 4c4cf51ed..faedd8f03 100644
--- a/libportfwd/include/portfwd/portfwd.h
+++ b/libportfwd/include/portfwd/portfwd.h
@@ -1,3 +1,5 @@
+#ifndef LIBPORTFWD_PORTFWD_H
+#define LIBPORTFWD_PORTFWD_H true
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -34,3 +36,4 @@ class Portfwd
         unsigned int m_upbps, m_downbps;
 };
 
+#endif
\ No newline at end of file
diff --git a/libportfwd/third-party/miniupnpc-1.4.20100609/minissdpc.c b/libportfwd/third-party/miniupnpc-1.4.20100609/minissdpc.c
index 33ffa3ab5..6c6b03651 100644
--- a/libportfwd/third-party/miniupnpc-1.4.20100609/minissdpc.c
+++ b/libportfwd/third-party/miniupnpc-1.4.20100609/minissdpc.c
@@ -23,7 +23,9 @@
 #define uint16_t unsigned short
 #endif
 /* Hack */
+#include <winsock.h>
 #define UNIX_PATH_LEN   108
+#include <stdint.h>
 struct sockaddr_un {
   uint16_t sun_family;
   char     sun_path[UNIX_PATH_LEN];
diff --git a/libportfwd/third-party/miniupnpc-1.4.20100609/miniupnpc.c b/libportfwd/third-party/miniupnpc-1.4.20100609/miniupnpc.c
index a0f1e893b..40dc19d09 100644
--- a/libportfwd/third-party/miniupnpc-1.4.20100609/miniupnpc.c
+++ b/libportfwd/third-party/miniupnpc-1.4.20100609/miniupnpc.c
@@ -28,7 +28,7 @@
 #include <winsock2.h>
 #include <ws2tcpip.h>
 #include <io.h>
-#include <IPHlpApi.h>
+#include <iphlpapi.h>
 #define snprintf _snprintf
 #if defined(_MSC_VER) && (_MSC_VER >= 1400)
 #define strncasecmp _memicmp