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-rw-r--r--src/gun_ws.erl2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/gun_ws.erl b/src/gun_ws.erl
index 86e8524..81682d6 100644
--- a/src/gun_ws.erl
+++ b/src/gun_ws.erl
@@ -54,7 +54,7 @@ do_check_options([{compress, B}|Opts]) when B =:= true; B =:= false ->
do_check_options([{default_protocol, M}|Opts]) when is_atom(M) ->
do_check_options(Opts);
do_check_options([Opt={protocols, L}|Opts]) when is_list(L) ->
- case lists:flatten([[is_binary(B), is_atom(M)] || {B, M} <- L]) of
+ case lists:usort(lists:flatten([[is_binary(B), is_atom(M)] || {B, M} <- L])) of
[true] -> do_check_options(Opts);
_ -> {error, {options, {ws, Opt}}}
end;