diff --git a/src/m3ua_core.erl b/src/m3ua_core.erl
index 1841517..2adc424 100644
--- a/src/m3ua_core.erl
+++ b/src/m3ua_core.erl
@@ -58,7 +58,6 @@
 	  user_args,
 	  sctp_remote_ip,
 	  sctp_remote_port,
-	  sctp_local_port,
 	  sctp_sock,
 	  sctp_assoc_id
 	}).
@@ -80,22 +79,25 @@
 			reconnect_sctp(L)
 	end.
 
+build_openopt({sctp_local_port, Port}) ->
+	{port, Port};
+build_openopt({sctp_local_ip, undefined}) ->
+	[];
+build_openopt({sctp_local_ip, Ip}) ->
+	{ip, Ip};
+build_openopt(_) ->
+	[].
+build_openopts(PropList) ->
+	[{active, once}, {reuseaddr, true}] ++
+	lists:flatten(lists:map(fun build_openopt/1, PropList)).
+
 init(InitOpts) ->
-	OpenOptsBase = [{active, once}, {reuseaddr, true}],
-	LocalPort = proplists:get_value(sctp_local_port, InitOpts),
-	case LocalPort of
-		undefined ->
-			OpenOpts = OpenOptsBase;
-		_ ->
-			OpenOpts = OpenOptsBase ++ [{port, LocalPort}]
-	end,
-	{ok, SctpSock} = gen_sctp:open(OpenOpts),
+	{ok, SctpSock} = gen_sctp:open(build_openopts(InitOpts)),
 	LoopDat = #m3ua_state{role = asp, sctp_sock = SctpSock,
 				user_fun = proplists:get_value(user_fun, InitOpts),
 				user_args = proplists:get_value(user_args, InitOpts),
 				sctp_remote_ip = proplists:get_value(sctp_remote_ip, InitOpts),
-				sctp_remote_port = proplists:get_value(sctp_remote_port, InitOpts),
-				sctp_local_port = LocalPort},
+				sctp_remote_port = proplists:get_value(sctp_remote_port, InitOpts)},
 	LoopDat2 = reconnect_sctp(LoopDat),
 	{ok, asp_down, LoopDat2}.
 
diff --git a/src/sctp_core.erl b/src/sctp_core.erl
index ca3217d..1e9fc21 100644
--- a/src/sctp_core.erl
+++ b/src/sctp_core.erl
@@ -86,19 +86,21 @@
 
 build_openopt({sctp_local_port, Port}) ->
 	{port, Port};
+build_openopt({sctp_local_ip, undefined}) ->
+	[];
 build_openopt({sctp_local_ip, Ip}) ->
 	{ip, Ip};
 build_openopt(_) ->
 	[].
+build_openopts(PropList) ->
+	[{active, once}, {reuseaddr, true}] ++ 
+	lists:flatten(lists:map(fun build_openopt/1, PropList)).
 
 init(InitOpts) ->
-	OpenOptsBase = [{active, once}, {reuseaddr, true}],
 	Module = proplists:get_value(module, InitOpts),
 	ModuleArgs = proplists:get_value(module_args, InitOpts),
 	Role = proplists:get_value(sctp_role, InitOpts),
-	OpenOpts = OpenOptsBase ++ lists:map(fun build_openopt/1, InitOpts),
-	io:format("sctp_open(~p)~n", [OpenOpts]),
-	{ok, SctpSock} = gen_sctp:open(OpenOpts),
+	{ok, SctpSock} = gen_sctp:open(build_openopts(InitOpts)),
 	case Module:init(ModuleArgs) of
 		{ok, ExtState} ->
 			LoopDat = #sctp_state{role = Role, sctp_sock = SctpSock,
diff --git a/src/ss7_link_m3ua.erl b/src/ss7_link_m3ua.erl
index d04e4bf..15ba837 100644
--- a/src/ss7_link_m3ua.erl
+++ b/src/ss7_link_m3ua.erl
@@ -57,8 +57,9 @@
 	#sigtran_peer{ip = LocalIp, port = LocalPort} = Local,
 	#sigtran_peer{ip = RemoteIp, port = RemotePort} = Remote,
 	% start the M3UA link to the SG
-	Opts = [{user_pid, self()}, {sctp_remote_ip, RemoteIp},
-		{sctp_remote_port, RemotePort}, {sctp_local_port, LocalPort},
+	Opts = [{user_pid, self()},
+		{sctp_remote_ip, RemoteIp}, {sctp_remote_port, RemotePort},
+		{sctp_local_ip, LocalIp}, {sctp_local_port, LocalPort},
 		{user_fun, fun m3ua_tx_to_user/2}, {user_args, self()}],
 	{ok, M3uaPid} = m3ua_core:start_link(Opts),
 	% FIXME: register this link with SCCP_SCRC