diff --git a/miniupnpc/minihttptestserver.c b/miniupnpc/minihttptestserver.c
index 32e3cb7..6663bc0 100644
--- a/miniupnpc/minihttptestserver.c
+++ b/miniupnpc/minihttptestserver.c
@@ -1,4 +1,4 @@
-/* $Id: minihttptestserver.c,v 1.18 2015/07/15 12:41:15 nanard Exp $ */
+/* $Id: minihttptestserver.c,v 1.19 2015/11/17 09:07:17 nanard Exp $ */
 /* Project : miniUPnP
  * Author : Thomas Bernard
  * Copyright (c) 2011-2015 Thomas Bernard
@@ -18,6 +18,10 @@
 #include <time.h>
 #include <errno.h>
 
+#ifndef INADDR_LOOPBACK
+#define INADDR_LOOPBACK         0x7f000001
+#endif
+
 #define CRAP_LENGTH (2048)
 
 volatile sig_atomic_t quit = 0;