4 files changed, 17 insertions, 6 deletions
diff --git a/lib/diameter/src/base/diameter.appup.src b/lib/diameter/src/base/diameter.appup.src
index 9b2a7d18ab..4de87c1023 100644
--- a/lib/diameter/src/base/diameter.appup.src
+++ b/lib/diameter/src/base/diameter.appup.src
@@ -38,12 +38,16 @@
             %% unmodified but including modified diameter.hrl
             {load, diameter_callback},
             {load, diameter_capx},
-            {load, diameter_types}]}
+            {load, diameter_types}]},
+  {"1.2", [{load, diameter_codec},
+           {load, diameter_peer_fsm}]}
  ],
  [
   {"0.9",  [{restart_application, diameter}]},
   {"0.10", [{restart_application, diameter}]},
   {"1.0",  [{restart_application, diameter}]},
-  {"1.1",  [{restart_application, diameter}]}
+  {"1.1",  [{restart_application, diameter}]},
+  {"1.2",  [{load, diameter_codec},
+            {load, diameter_peer_fsm}]}
  ]
 }.
diff --git a/lib/diameter/src/base/diameter_codec.erl b/lib/diameter/src/base/diameter_codec.erl
index 421e280422..a94d37f7a8 100644
--- a/lib/diameter/src/base/diameter_codec.erl
+++ b/lib/diameter/src/base/diameter_codec.erl
@@ -333,6 +333,9 @@ decode_header(_) ->
 %% wraparound counter. The 8-bit counter is incremented each time the
 %% system is restarted.
 
+sequence_numbers({_,_} = T) ->
+    T;
+
 sequence_numbers(#diameter_packet{bin = Bin})
   when is_binary(Bin) ->
     sequence_numbers(Bin);
diff --git a/lib/diameter/src/base/diameter_peer_fsm.erl b/lib/diameter/src/base/diameter_peer_fsm.erl
index 302540e76b..035bdad632 100644
--- a/lib/diameter/src/base/diameter_peer_fsm.erl
+++ b/lib/diameter/src/base/diameter_peer_fsm.erl
@@ -967,12 +967,16 @@ dpa_timer() ->
 %% both fail to do so this isn't foolproof.
 
 register_everywhere(T) ->
-    diameter_reg:add_new(T)
-        andalso unregistered(T).
+    diameter_reg:add_new(T) andalso unregistered(T).
 
 unregistered(T) ->
     {ResL, _} = rpc:multicall(?MODULE, match, [{node(), T}]),
-    lists:all(fun(L) -> [] == L end, ResL).
+    lists:all(fun nomatch/1, ResL).
+
+nomatch({badrpc, {'EXIT', {undef, _}}}) ->  %% no diameter on remote node
+    true;
+nomatch(L) ->
+    [] == L.
 
 match({Node, _})
   when Node == node() ->
diff --git a/lib/diameter/vsn.mk b/lib/diameter/vsn.mk
index 48e6596e72..a67b468511 100644
--- a/lib/diameter/vsn.mk
+++ b/lib/diameter/vsn.mk
@@ -18,7 +18,7 @@
 # %CopyrightEnd%
 
 APPLICATION  = diameter
-DIAMETER_VSN = 1.2
+DIAMETER_VSN = 1.2.1
 PRE_VSN      =
 APP_VSN      = "$(APPLICATION)-$(DIAMETER_VSN)$(PRE_VSN)"