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-rw-r--r--lib/asn1/src/asn1ct_gen_per.erl3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/asn1/src/asn1ct_gen_per.erl b/lib/asn1/src/asn1ct_gen_per.erl
index 30c9ab9365..69d9d51bf1 100644
--- a/lib/asn1/src/asn1ct_gen_per.erl
+++ b/lib/asn1/src/asn1ct_gen_per.erl
@@ -250,7 +250,8 @@ emit_enc_enumerated_case(Erules, C, EnumName, Count) ->
enc_ext_and_val(per, E, F, Args) ->
[E|apply(asn1ct_eval_per, F, Args)];
enc_ext_and_val(uper, E, F, Args) ->
- <<E:1,(apply(asn1ct_eval_uper, F, Args))/bitstring>>.
+ Bs = list_to_bitstring([apply(asn1ct_eval_uper, F, Args)]),
+ <<E:1,Bs/bitstring>>.
%% Object code generating for encoding and decoding