diff --git a/lib/bandit/trace.ex b/lib/bandit/trace.ex
index a86cba15..6b2df88e 100644
--- a/lib/bandit/trace.ex
+++ b/lib/bandit/trace.ex
@@ -83,7 +83,7 @@ defmodule Bandit.Trace do
 
   @impl GenServer
   def init(opts) do
-    :telemetry.attach_many(self(), @events, &__MODULE__.handle_event/4, self())
+    _ = :telemetry.attach_many(self(), @events, &__MODULE__.handle_event/4, self())
     {:ok, struct!(%__MODULE__{queue: :queue.new()}, opts)}
   end