diff --git a/doc/configuration.txt b/doc/configuration.txt
index aa21212..223d479 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -7156,11 +7156,19 @@
   kernel version. Some distribution kernels include backports of the feature,
   so check for support with your vendor.
 
+v4v6
+  Is an optional keyword which is supported only on most recent systems
+  including Linux kernels >= 2.4.21. It is used to bind a socket to both IPv4
+  and IPv6 when it uses the default address. Doing so is sometimes necessary
+  on systems which bind to IPv6 only by default. It has no effect on non-IPv6
+  sockets, and is overriden by the "v6only" option.
+
 v6only
   Is an optional keyword which is supported only on most recent systems
   including Linux kernels >= 2.4.21. It is used to bind a socket to IPv6 only
   when it uses the default address. Doing so is sometimes preferred to doing it
-  system-wide as it is per-listener. It has no effect on non-IPv6 sockets.
+  system-wide as it is per-listener. It has no effect on non-IPv6 sockets and
+  has precedence over the "v4v6" option.
 
 uid <uid>
   Sets the owner of the UNIX sockets to the designated system uid. It can also
diff --git a/include/types/listener.h b/include/types/listener.h
index 0bdde76..d5d91f4 100644
--- a/include/types/listener.h
+++ b/include/types/listener.h
@@ -91,6 +91,7 @@
 #define LI_O_UNLIMITED  0x0080  /* listener not subject to global limits (peers & stats socket) */
 #define LI_O_TCP_FO     0x0100  /* enable TCP Fast Open (linux >= 3.6) */
 #define LI_O_V6ONLY     0x0200  /* bind to IPv6 only on Linux >= 2.4.21 */
+#define LI_O_V4V6       0x0400  /* bind to IPv4/IPv6 on Linux >= 2.4.21 */
 
 /* Note: if a listener uses LI_O_UNLIMITED, it is highly recommended that it adds its own
  * maxconn setting to the global.maxsock value so that its resources are reserved.
diff --git a/src/proto_tcp.c b/src/proto_tcp.c
index 86073a4..5516036 100644
--- a/src/proto_tcp.c
+++ b/src/proto_tcp.c
@@ -703,6 +703,8 @@
 #if defined(IPV6_V6ONLY)
 	if (listener->options & LI_O_V6ONLY)
                 setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &one, sizeof(one));
+	else if (listener->options & LI_O_V4V6)
+                setsockopt(fd, IPPROTO_IPV6, IPV6_V6ONLY, &zero, sizeof(zero));
 #endif
 
 	if (bind(fd, (struct sockaddr *)&listener->addr, listener->proto->sock_addrlen) == -1) {
@@ -1727,6 +1729,19 @@
 }
 
 #ifdef IPV6_V6ONLY
+/* parse the "v4v6" bind keyword */
+static int bind_parse_v4v6(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
+{
+	struct listener *l;
+
+	list_for_each_entry(l, &conf->listeners, by_bind) {
+		if (l->addr.ss_family == AF_INET6)
+			l->options |= LI_O_V4V6;
+	}
+
+	return 0;
+}
+
 /* parse the "v6only" bind keyword */
 static int bind_parse_v6only(char **args, int cur_arg, struct proxy *px, struct bind_conf *conf, char **err)
 {
@@ -1899,6 +1914,7 @@
 	{ "transparent",   bind_parse_transparent,  0 }, /* transparently bind to the specified addresses */
 #endif
 #ifdef IPV6_V6ONLY
+	{ "v4v6",          bind_parse_v4v6,         0 }, /* force socket to bind to IPv4+IPv6 */
 	{ "v6only",        bind_parse_v6only,       0 }, /* force socket to bind to IPv6 only */
 #endif
 	/* the versions with the NULL parse function*/
@@ -1906,6 +1922,7 @@
 	{ "interface",     NULL,  1 },
 	{ "mss",           NULL,  1 },
 	{ "transparent",   NULL,  0 },
+	{ "v4v6",          NULL,  0 },
 	{ "v6only",        NULL,  0 },
 	{ NULL, NULL, 0 },
 }};