diff --git a/components/script/dom/bindings/settings_stack.rs b/components/script/dom/bindings/settings_stack.rs
index c12c48f3c35..66d408cce2f 100644
--- a/components/script/dom/bindings/settings_stack.rs
+++ b/components/script/dom/bindings/settings_stack.rs
@@ -43,6 +43,7 @@ pub(crate) fn is_execution_stack_empty() -> bool {
 pub(crate) struct AutoEntryScript {
     global: DomRoot<GlobalScope>,
     #[cfg(feature = "tracing")]
+    #[allow(dead_code)]
     span: tracing::span::EnteredSpan,
 }
 
diff --git a/components/servo/lib.rs b/components/servo/lib.rs
index a7215f372db..b6b38f7e8e9 100644
--- a/components/servo/lib.rs
+++ b/components/servo/lib.rs
@@ -227,7 +227,7 @@ where
     #[cfg_attr(
         feature = "tracing",
         tracing::instrument(
-            skip(rendering_context, embedder, window),
+            skip(preferences, rendering_context, embedder, window),
             fields(servo_profiling = true),
             level = "trace",
         )