--- a/res/res_rtp_asterisk.c
+++ b/res/res_rtp_asterisk.c
@@ -1645,7 +1645,7 @@
 	unsigned int count = PJ_ARRAY_SIZE(address), pos = 0;
 
 	/* Add all the local interface IP addresses */
-	pj_enum_ip_interface(ast_sockaddr_is_ipv4(addr) ? pj_AF_INET() : pj_AF_INET6(), &count, address);
+	pj_enum_ip_interface(ast_sockaddr_is_ipv4(addr) ? pj_AF_INET() : ast_sockaddr_is_any(addr) ? PJ_AF_UNSPEC : pj_AF_INET6(), &count, address);
 
 	for (pos = 0; pos < count; pos++) {
 		pj_sockaddr_set_port(&address[pos], port);