6 files changed, 78 insertions, 2 deletions
diff --git a/lib/asn1/src/asn1ct_constructed_per.erl b/lib/asn1/src/asn1ct_constructed_per.erl
index 3f1be4febb..aff383479b 100644
--- a/lib/asn1/src/asn1ct_constructed_per.erl
+++ b/lib/asn1/src/asn1ct_constructed_per.erl
@@ -985,9 +985,11 @@ gen_enc_components_call1(Gen, TopType, [C|Rest], DynamicEnc, Ext) ->
 		   Imm1;
 	       'OPTIONAL' ->
 		   enc_absent(Gen, Element, [asn1_NOVALUE], Imm1);
-	       {'DEFAULT',Def} ->
+	       {'DEFAULT',Def} when Ext =:= noext ->
 		   DefValues = def_values(Type, Def),
-		   enc_absent(Gen, Element, DefValues, Imm1)
+		   enc_absent(Gen, Element, DefValues, Imm1);
+               {'DEFAULT',_} ->
+		   enc_absent(Gen, Element, [asn1_DEFAULT], Imm1)
 	   end,
     Imm = case Imm2 of
 	      [] -> [];
diff --git a/lib/asn1/src/asn1rtt_per_common.erl b/lib/asn1/src/asn1rtt_per_common.erl
index 2ecc9e4bc7..5b5f47dfee 100644
--- a/lib/asn1/src/asn1rtt_per_common.erl
+++ b/lib/asn1/src/asn1rtt_per_common.erl
@@ -542,6 +542,7 @@ extension_bitmap(_Val, Pos, Limit, Acc) when Pos >= Limit ->
 extension_bitmap(Val, Pos, Limit, Acc) ->
     Bit = case element(Pos, Val) of
 	      asn1_NOVALUE -> 0;
+	      asn1_DEFAULT -> 0;
 	      _ -> 1
 	  end,
     extension_bitmap(Val, Pos+1, Limit, (Acc bsl 1) bor Bit).
diff --git a/lib/asn1/test/Makefile b/lib/asn1/test/Makefile
index f4041fa89b..c38d1c6ebd 100644
--- a/lib/asn1/test/Makefile
+++ b/lib/asn1/test/Makefile
@@ -43,6 +43,7 @@ MODULES= \
 	testChoTypeRefSet \
 	testConstraints \
 	testDef \
+	testExtensionDefault \
 	testOpt \
 	testSeqDefault \
 	testSeqExtension \
diff --git a/lib/asn1/test/asn1_SUITE.erl b/lib/asn1/test/asn1_SUITE.erl
index 5fe6945ff2..69f226bcc0 100644
--- a/lib/asn1/test/asn1_SUITE.erl
+++ b/lib/asn1/test/asn1_SUITE.erl
@@ -147,6 +147,7 @@ groups() ->
        testImport,
        testDER,
        testDEFAULT,
+       testExtensionDefault,
        testMvrasn6,
        testContextSwitchingTypes,
        testOpenTypeImplicitTag,
@@ -444,6 +445,12 @@ testDEFAULT(Config, Rule, Opts) ->
     testDef:main(Rule),
     testSeqSetDefaultVal:main(Rule, Opts).
 
+testExtensionDefault(Config) ->
+    test(Config, fun testExtensionDefault/3).
+testExtensionDefault(Config, Rule, Opts) ->
+    asn1_test_lib:compile_all(["ExtensionDefault"], Config, [Rule|Opts]),
+    testExtensionDefault:main(Rule).
+
 testMaps(Config) ->
     test(Config, fun testMaps/3,
          [{ber,[maps,no_ok_wrapper]},
diff --git a/lib/asn1/test/asn1_SUITE_data/ExtensionDefault.asn1 b/lib/asn1/test/asn1_SUITE_data/ExtensionDefault.asn1
new file mode 100644
index 0000000000..67d9cb6312
--- /dev/null
+++ b/lib/asn1/test/asn1_SUITE_data/ExtensionDefault.asn1
@@ -0,0 +1,12 @@
+ExtensionDefault DEFINITIONS AUTOMATIC TAGS ::=
+
+BEGIN
+
+Message ::= SEQUENCE {
+    id INTEGER (0..5),
+    ...,
+    priority Priority DEFAULT low
+}
+Priority ::= ENUMERATED { low(0), high(1), ... }
+
+END
diff --git a/lib/asn1/test/testExtensionDefault.erl b/lib/asn1/test/testExtensionDefault.erl
new file mode 100644
index 0000000000..cc50fa95b8
--- /dev/null
+++ b/lib/asn1/test/testExtensionDefault.erl
@@ -0,0 +1,53 @@
+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 2017. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%%     http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+%%
+-module(testExtensionDefault).
+
+-export([main/1]).
+
+main(_Erule) ->
+    roundtrip('Message', {'Message',1,low}),    %Will be explicitly encoded.
+    roundtrip('Message', {'Message',1,high}),
+    roundtrip('Message', {'Message',1,asn1_DEFAULT}, {'Message',1,low}),
+
+    map_roundtrip('Message', #{id=>1,priority=>low}), %Will be explicitly encoded.
+    map_roundtrip('Message', #{id=>1,priority=>high}),
+    map_roundtrip('Message', #{id=>1}, #{id=>1,priority=>low}),
+    ok.
+
+roundtrip(Type, Value) ->
+    asn1_test_lib:roundtrip('ExtensionDefault', Type, Value).
+
+roundtrip(Type, Value, Expected) ->
+    %% asn1_test_lib:roundtrip/3 will invoke map_roundtrip/3, which will
+    %% not work in this case. Therefore, implement the roundtrip ourselves.
+    M = 'ExtensionDefault',
+    {ok,Enc} = M:encode(Type, Value),
+    {ok,Expected} = M:decode(Type, Enc),
+    ok.
+
+map_roundtrip(Type, Value) ->
+    map_roundtrip(Type, Value, Value).
+
+map_roundtrip(Type, Value, Expected) ->
+    M = 'maps_ExtensionDefault',
+    Enc = M:encode(Type, Value),
+    Expected = M:decode(Type, Enc),
+    ok.