diff --git a/lib/pleroma/config/deprecation_warnings.ex b/lib/pleroma/config/deprecation_warnings.ex
index 73ef41145..c213f3ce6 100644
--- a/lib/pleroma/config/deprecation_warnings.ex
+++ b/lib/pleroma/config/deprecation_warnings.ex
@@ -66,7 +66,7 @@ def check_simple_policy_tuples do
 
       new_config =
         Config.get([:mrf_simple])
-        |> Enum.filter(fn {k, v} -> not is_atom(v) end)
+        |> Enum.filter(fn {_k, v} -> not is_atom(v) end)
         |> Enum.map(fn {k, v} ->
           {k,
            Enum.map(v, fn