diff --git a/dhcpcd.conf.5.in b/dhcpcd.conf.5.in
index 32183d0a..de0b97fc 100644
--- a/dhcpcd.conf.5.in
+++ b/dhcpcd.conf.5.in
@@ -22,7 +22,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.Dd February 5, 2013
+.Dd March 27, 2013
 .Dt DHCPCD.CONF 5 SMM
 .Os
 .Sh NAME
@@ -179,6 +179,9 @@ Metrics are used to prefer an interface over another one, lowest wins.
 will supply a default metric of 200 +
 .Xr if_nametoindex 3 .
 An extra 100 will be added for wireless interfaces.
+.It Ic noalias
+IPv4 addresses added will overwrite a pre-existing address instead of working
+alongside.
 .It Ic noarp
 Don't send any ARP requests.
 This also disables IPv4LL.
diff --git a/if-bsd.c b/if-bsd.c
index 45b3a48b..e9d32f52 100644
--- a/if-bsd.c
+++ b/if-bsd.c
@@ -201,7 +201,8 @@ if_address(const struct interface *iface, const struct in_addr *address,
 #undef ADDADDR
 
 	return ioctl(socket_afnet,
-	    action < 0 ? SIOCDIFADDR : SIOCAIFADDR, &ifa);
+	    action < 0 ? SIOCDIFADDR :
+	    action == 2 ? SIOCSIFADDR :  SIOCAIFADDR, &ifa);
 }
 
 int
diff --git a/if-options.c b/if-options.c
index a75027e3..f058636b 100644
--- a/if-options.c
+++ b/if-options.c
@@ -61,6 +61,7 @@ unsigned long long options = 0;
 #define O_IPV6RA_FORK		O_BASE + 6 
 #define O_IPV6RA_OWN		O_BASE + 7
 #define O_IPV6RA_OWN_D		O_BASE + 8
+#define O_NOALIAS		O_BASE + 9
 
 const struct option cf_options[] = {
 	{"background",      no_argument,       NULL, 'b'},
@@ -118,6 +119,7 @@ const struct option cf_options[] = {
 	{"ipv6ra_own_default", no_argument,    NULL, O_IPV6RA_OWN_D},
 	{"ipv4only",        no_argument,       NULL, '4'},
 	{"ipv6only",        no_argument,       NULL, '6'},
+	{"noalias",         no_argument,       NULL, O_NOALIAS},
 	{NULL,              0,                 NULL, '\0'}
 };
 
@@ -915,6 +917,9 @@ parse_option(struct if_options *ifo, int opt, const char *arg)
 	case O_IPV6RA_OWN_D:
 		ifo->options |= DHCPCD_IPV6RA_OWN_DEFAULT;
 		break;
+	case O_NOALIAS:
+		ifo->options |= DHCPCD_NOALIAS;
+		break;
 	default:
 		return 0;
 	}
diff --git a/if-options.h b/if-options.h
index c6032b7c..81715d2c 100644
--- a/if-options.h
+++ b/if-options.h
@@ -88,6 +88,7 @@
 #define DHCPCD_FORKED			(1ULL << 36)
 #define DHCPCD_IPV6			(1ULL << 37)
 #define DHCPCD_STARTED			(1ULL << 38)
+#define DHCPCD_NOALIAS			(1ULL << 39)
 
 extern const struct option cf_options[];
 
diff --git a/ipv4.c b/ipv4.c
index 46d14b6b..b4e128e1 100644
--- a/ipv4.c
+++ b/ipv4.c
@@ -592,6 +592,7 @@ ipv4_applyaddr(void *arg)
 	struct dhcp_lease *lease;
 	struct if_options *ifo = ifp->options;
 	struct rt *rt;
+	int r;
 
 	/* As we are now adjusting an interface, we need to ensure
 	 * we have them in the right order for routing and configuration. */
@@ -619,10 +620,13 @@ ipv4_applyaddr(void *arg)
 		syslog(LOG_DEBUG, "%s: adding IP address %s/%d",
 		    ifp->name, inet_ntoa(lease->addr),
 		    inet_ntocidr(lease->net));
-		if (ipv4_addaddress(ifp,
-			&lease->addr, &lease->net, &lease->brd) == -1 &&
-		    errno != EEXIST)
-		{
+		if (ifo->options & DHCPCD_NOALIAS)
+			r = ipv4_setaddress(ifp,
+			    &lease->addr, &lease->net, &lease->brd);
+		else
+			r = ipv4_addaddress(ifp,
+			    &lease->addr, &lease->net, &lease->brd);
+		if (r == -1 && errno != EEXIST) {
 			syslog(LOG_ERR, "%s: ipv4_addaddress: %m", __func__);
 			return;
 		}
diff --git a/ipv4.h b/ipv4.h
index 712b5339..bc1c691a 100644
--- a/ipv4.h
+++ b/ipv4.h
@@ -61,6 +61,8 @@ int if_address(const struct interface *,
     const struct in_addr *, int);
 #define ipv4_addaddress(iface, addr, net, brd)				      \
 	if_address(iface, addr, net, brd, 1)
+#define ipv4_setaddress(iface, addr, net, brd)				      \
+	if_address(iface, addr, net, brd, 2)
 #define ipv4_deleteaddress(iface, addr, net)				      \
 	if_address(iface, addr, net, NULL, -1)
 #define ipv4_hasaddress(iface, addr, net)				      \