diff --git a/osdep/PortMapper.cpp b/osdep/PortMapper.cpp
index 49e88c8a3..b8d2f9a78 100644
--- a/osdep/PortMapper.cpp
+++ b/osdep/PortMapper.cpp
@@ -230,7 +230,12 @@ public:
 					OSUtils::ztsnprintf(inport,sizeof(inport),"%d",localPort);
 
 					int foundValidIGD = 0;
+#if MINIUPNPC_API_VERSION < 18
 					if ((foundValidIGD = UPNP_GetValidIGD(devlist,&urls,&data,lanaddr,sizeof(lanaddr)))&&(lanaddr[0])) {
+#else
+					if ((foundValidIGD = UPNP_GetValidIGD(devlist,&urls,&data,lanaddr,sizeof(lanaddr),NULL,0))&&(lanaddr[0])) {
+#endif
+
 #ifdef ZT_PORTMAPPER_TRACE
                         PM_TRACE("PortMapper: UPnP: my LAN IP address: %s" ZT_EOL_S,lanaddr);
 #endif