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-rw-r--r--lib/stdlib/src/ms_transform.erl6
1 files changed, 6 insertions, 0 deletions
diff --git a/lib/stdlib/src/ms_transform.erl b/lib/stdlib/src/ms_transform.erl
index 27dfcf52e1..e671dcd8cf 100644
--- a/lib/stdlib/src/ms_transform.erl
+++ b/lib/stdlib/src/ms_transform.erl
@@ -1079,6 +1079,12 @@ normalise({cons,_,Head,Tail}) ->
[normalise(Head)|normalise(Tail)];
normalise({tuple,_,Args}) ->
list_to_tuple(normalise_list(Args));
+normalise({map,_,Pairs0}) ->
+ Pairs1 = lists:map(fun ({map_field_exact,_,K,V}) ->
+ {normalise(K),normalise(V)}
+ end,
+ Pairs0),
+ maps:from_list(Pairs1);
%% Special case for unary +/-.
normalise({op,_,'+',{char,_,I}}) -> I;
normalise({op,_,'+',{integer,_,I}}) -> I;