diff --git a/src/server.c b/src/server.c
index 56ee6a19f..ee743e7b9 100644
--- a/src/server.c
+++ b/src/server.c
@@ -3516,6 +3516,9 @@ int update_server_addr(struct server *s, void *ip, int ip_sin_family, const char
 		case AF_INET6:
 			inet_ntop(s->addr.ss_family, &((struct sockaddr_in6 *)&s->addr)->sin6_addr, oldip, INET6_ADDRSTRLEN);
 			break;
+		default:
+			strcpy(oldip, "(none)");
+			break;
 		};
 
 		/* copy new IP address in a string */