diff --git a/include/libbb.h b/include/libbb.h
index fda0dbe40..def6124d7 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -319,6 +319,9 @@ len_and_sockaddr* host2sockaddr(const char *host, int port);
 #if ENABLE_FEATURE_IPV6
 /* Same, useful if you want to force family (e.g. IPv6) */
 len_and_sockaddr* host_and_af2sockaddr(const char *host, int port, sa_family_t af);
+#else
+/* [we evaluate af: think about "host_and_af2sockaddr(..., af++)"] */
+#define host_and_af2sockaddr(host, port, af) ((af), host2sockaddr((host), (port)))
 #endif
 /* Assign sin[6]_port member if the socket is of corresponding type,
  * otherwise no-op. Useful for ftp.