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-rw-r--r--src/rabbit_channel.erl2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/rabbit_channel.erl b/src/rabbit_channel.erl
index 79815d68..a94d2ab5 100644
--- a/src/rabbit_channel.erl
+++ b/src/rabbit_channel.erl
@@ -477,7 +477,7 @@ check_user_id_header(#'P_basic'{user_id = Claimed},
check_expiration_header(Props) ->
case rabbit_basic:parse_expiration(Props) of
{ok, _} -> ok;
- {error, E} -> precondition_failed("invalid expiration '~s': ~w",
+ {error, E} -> precondition_failed("invalid expiration '~s': ~p",
[Props#'P_basic'.expiration, E])
end.