diff --git a/miniupnpc/minissdpc.c b/miniupnpc/minissdpc.c
index 0d33ec0..ea763e5 100644
--- a/miniupnpc/minissdpc.c
+++ b/miniupnpc/minissdpc.c
@@ -539,7 +539,7 @@ ssdpDiscoverDevices(const char * const deviceTypes[],
 /* Get IP associated with the index given in the ip_forward struct
  * in order to give this ip to setsockopt(sudp, IPPROTO_IP, IP_MULTICAST_IF) */
 	if(!ipv6) {
-#if _WIN32_WINNT > _WIN32_WINNT_WINXP
+#if _WIN32_WINNT >= _WIN32_WINNT_VISTA
 	  IN_ADDR addr;
 	  InetPtonA(AF_INET, "223.255.255.255", &addr);
 #else
@@ -662,7 +662,7 @@ ssdpDiscoverDevices(const char * const deviceTypes[],
 #endif
 		} else {
 			struct in_addr mc_if;
-#if defined(_WIN32) && (_WIN32_WINNT > _WIN32_WINNT_WINXP)
+#if defined(_WIN32) && (_WIN32_WINNT >= _WIN32_WINNT_VISTA)
 			InetPtonA(AF_INET, multicastif, &mc_if);
 #else
 			mc_if.s_addr = inet_addr(multicastif); /* ex: 192.168.x.x */