diff --git a/miniupnpd/upnpsoap.c b/miniupnpd/upnpsoap.c
index b917783..520aa72 100644
--- a/miniupnpd/upnpsoap.c
+++ b/miniupnpd/upnpsoap.c
@@ -2,7 +2,7 @@
 /* vim: tabstop=4 shiftwidth=4 noexpandtab
  * MiniUPnP project
  * http://miniupnp.free.fr/ or https://miniupnp.tuxfamily.org/
- * (c) 2006-2019 Thomas Bernard
+ * (c) 2006-2020 Thomas Bernard
  * This software is subject to the conditions detailed
  * in the LICENCE file provided within the distribution */
 
@@ -332,20 +332,24 @@ GetExternalIPAddress(struct upnphttp * h, const char * action, const char * ns)
 	 * There is usually no NAT with IPv6 */
 
 #ifndef MULTIPLE_EXTERNAL_IP
-	struct in_addr addr;
 	if(use_ext_ip_addr)
 	{
 		strncpy(ext_ip_addr, use_ext_ip_addr, INET_ADDRSTRLEN);
 		ext_ip_addr[INET_ADDRSTRLEN - 1] = '\0';
 	}
-	else if(getifaddr(ext_if_name, ext_ip_addr, INET_ADDRSTRLEN, &addr, NULL) < 0)
+	else
 	{
-		syslog(LOG_ERR, "Failed to get ip address for interface %s",
-			ext_if_name);
-		strncpy(ext_ip_addr, "0.0.0.0", INET_ADDRSTRLEN);
+		struct in_addr addr;
+		if(getifaddr(ext_if_name, ext_ip_addr, INET_ADDRSTRLEN, &addr, NULL) < 0)
+		{
+			syslog(LOG_ERR, "Failed to get ip address for interface %s",
+				ext_if_name);
+			strncpy(ext_ip_addr, "0.0.0.0", INET_ADDRSTRLEN);
+		} else if (addr_is_reserved(&addr)) {
+			syslog(LOG_NOTICE, "private/reserved address %s is not suitable for external IP", ext_ip_addr);
+			strncpy(ext_ip_addr, "0.0.0.0", INET_ADDRSTRLEN);
+		}
 	}
-	if (addr_is_reserved(&addr))
-		strncpy(ext_ip_addr, "0.0.0.0", INET_ADDRSTRLEN);
 #else
 	struct lan_addr_s * lan_addr;
 	strncpy(ext_ip_addr, "0.0.0.0", INET_ADDRSTRLEN);