4 files changed, 19 insertions, 11 deletions
diff --git a/lib/asn1/src/asn1ct_check.erl b/lib/asn1/src/asn1ct_check.erl
index e1911d8170..0622998445 100644
--- a/lib/asn1/src/asn1ct_check.erl
+++ b/lib/asn1/src/asn1ct_check.erl
@@ -1025,8 +1025,8 @@ prepare_objset({{'SingleValue',Set},Ext}) ->
 %%    {set,lists:append([Set,Ext]),true};
 prepare_objset({Set,Ext}) when is_list(Set) ->
     {set,merge_sets(Set,Ext),true};
-prepare_objset({ObjDef={object,definedsyntax,_ObjFields},_Ext}) ->
-    {set,[ObjDef],true};
+prepare_objset({{object,definedsyntax,_ObjFields}=Set,Ext}) ->
+    {set,merge_sets(Set, Ext),true};
 prepare_objset(ObjDef={object,definedsyntax,_ObjFields}) ->
     {set,[ObjDef],false};
 prepare_objset({ObjDef=#type{},Ext}) when is_list(Ext) ->
@@ -4034,8 +4034,8 @@ categorize(S,value,Type,Value) ->
     [#valuedef{type=Type,value=Value,module=S#state.mname}].
 
 
-parse_objectset({valueset,T=#type{}}) ->
-    [T];
+parse_objectset({valueset,#type{def=#'Externaltypereference'{}=Ref}}) ->
+    Ref;
 parse_objectset({valueset,Set}) ->
     Set;
 parse_objectset(#type{def=Ref}) when is_record(Ref,'Externaltypereference') ->
diff --git a/lib/asn1/src/asn1ct_imm.erl b/lib/asn1/src/asn1ct_imm.erl
index 869bda5d52..4b2c3b1b65 100644
--- a/lib/asn1/src/asn1ct_imm.erl
+++ b/lib/asn1/src/asn1ct_imm.erl
@@ -61,6 +61,8 @@ optimize_alignment(Imm, Al) ->
 per_dec_boolean() ->
     {map,{get_bits,1,[1]},[{0,false},{1,true}]}.
 
+per_dec_enumerated([{V,_}], _Aligned) ->
+    {value,V};
 per_dec_enumerated(NamedList0, Aligned) ->
     Ub = length(NamedList0) - 1,
     Constraint = [{'ValueRange',{0,Ub}}],
@@ -375,6 +377,8 @@ opt_al({call,Fun,E0}, A0) ->
 opt_al({convert,Op,E0}, A0) ->
     {E,A} = opt_al(E0, A0),
     {{convert,Op,E},A};
+opt_al({value,V}=Term, A) when is_integer(V); is_atom(V) ->
+    {Term,A};
 opt_al({value,E0}, A0) ->
     {E,A} = opt_al(E0, A0),
     {{value,E},A};
@@ -391,8 +395,6 @@ opt_al({'case',Cs0}, A0) ->
 opt_al({map,E0,Cs}, A0) ->
     {E,A} = opt_al(E0, A0),
     {{map,E,Cs},A};
-opt_al('NULL'=Null, A) ->
-    {Null,A};
 opt_al(I, A) when is_integer(I) ->
     {I,A}.
 
@@ -480,8 +482,8 @@ flatten({map,E0,Cs0}, Buf0, St0) ->
     {Dst,St2} = new_var("Int", St1),
     Cs = flatten_map_cs(Cs0, E),
     {{Dst,DstBuf},Pre++[{'map',E,Cs,{Dst,DstBuf}}],St2};
-flatten({value,'NULL'}, Buf0, St0) ->
-    {{"'NULL'",Buf0},[],St0};
+flatten({value,V}, Buf0, St0) when is_atom(V) ->
+    {{"'"++atom_to_list(V)++"'",Buf0},[],St0};
 flatten({value,V0}, Buf0, St0) when is_integer(V0) ->
     {{V0,Buf0},[],St0};
 flatten({value,V0}, Buf0, St0) ->
diff --git a/lib/asn1/src/asn1rtt_per.erl b/lib/asn1/src/asn1rtt_per.erl
index 84ff809912..aa6cf4da0a 100644
--- a/lib/asn1/src/asn1rtt_per.erl
+++ b/lib/asn1/src/asn1rtt_per.erl
@@ -963,7 +963,10 @@ encode_relative_oid(Val) when is_list(Val) ->
 %%
 
 complete(L) ->
-    asn1rt_nif:encode_per_complete(L).
+    case asn1rt_nif:encode_per_complete(L) of
+	<<>> -> <<0>>;
+	Bin -> Bin
+    end.
 
 octets_to_complete(Len,Val) when Len < 256 ->
     [20,Len,Val];
diff --git a/lib/asn1/src/asn1rtt_uper.erl b/lib/asn1/src/asn1rtt_uper.erl
index ad0678f3c3..8efe9a7b0f 100644
--- a/lib/asn1/src/asn1rtt_uper.erl
+++ b/lib/asn1/src/asn1rtt_uper.erl
@@ -1016,8 +1016,11 @@ complete(InList) when is_list(InList) ->
 		Bits -> <<Res/bitstring,0:(8-Bits)>>
 	end
     end;
-complete(InList) when is_binary(InList) ->
-    InList;
+complete(Bin) when is_binary(Bin) ->
+    case Bin of
+	<<>> -> <<0>>;
+	_ -> Bin
+    end;
 complete(InList) when is_bitstring(InList) ->
     PadLen = 8 - (bit_size(InList) band 7),
     <<InList/bitstring,0:PadLen>>.