diff --git a/src/mtp2_lsc.erl b/src/mtp2_lsc.erl
index 459d77b..9bcce0d 100644
--- a/src/mtp2_lsc.erl
+++ b/src/mtp2_lsc.erl
@@ -190,9 +190,12 @@
 	send_to(txc, si_os, LoopDat),
 	{next_state, out_of_service, LoopDat#lsc_state{local_proc_out=0, emergency=0}};
 
-% ignore
+% forward into IAC sub-state-machine
 initial_alignment(What, LoopDat) when
-		What == si_n; What == si_e; What == si_o; What == si_os ->
+		What == si_n; What == si_e; What == si_o; What == si_os;
+		What == fisu_msu_received ->
+	Iac = LoopDat#lsc_state.iac_pid,
+	gen_fsm:send_event(Iac, What),
 	{next_state, initial_alignment, LoopDat}.
 
 
diff --git a/src/sctp_m2pa.erl b/src/sctp_m2pa.erl
index c42c16a..fc0a063 100644
--- a/src/sctp_m2pa.erl
+++ b/src/sctp_m2pa.erl
@@ -136,8 +136,9 @@
 	   LsMtp2 == si_po ->
 		gen_fsm:send_event(LoopDat#m2pa_state.lsc_pid, LsMtp2);
 	   LsMtp2 == si_n; LsMtp2 == si_e; LsMtp2 == si_o; LsMtp2 == si_os ->
-		gen_fsm:send_event(LoopDat#m2pa_state.lsc_pid, LsMtp2),
-		gen_fsm:send_event(LoopDat#m2pa_state.iac_pid, LsMtp2)
+		gen_fsm:send_event(LoopDat#m2pa_state.lsc_pid, LsMtp2)
+		% IAC will receive the event as pass-through from LSC
+		%gen_fsm:send_event(LoopDat#m2pa_state.iac_pid, LsMtp2)
 	end.
 
 % convert M2PA link state to MTP2