diff --git a/tracing-subscriber/src/fmt/fmt_layer.rs b/tracing-subscriber/src/fmt/fmt_layer.rs
index ac0990b3fd..e557f9f0a3 100644
--- a/tracing-subscriber/src/fmt/fmt_layer.rs
+++ b/tracing-subscriber/src/fmt/fmt_layer.rs
@@ -70,7 +70,7 @@ pub struct Layer<
     fmt_event: E,
     fmt_span: format::FmtSpanConfig,
     is_ansi: bool,
-    _inner: PhantomData<S>,
+    _inner: PhantomData<fn(S)>,
 }
 
 impl<S> Layer<S> {
diff --git a/tracing-subscriber/src/layer/mod.rs b/tracing-subscriber/src/layer/mod.rs
index 13eb7e6774..3cd55c832f 100644
--- a/tracing-subscriber/src/layer/mod.rs
+++ b/tracing-subscriber/src/layer/mod.rs
@@ -236,10 +236,10 @@
 //! }
 //!
 //! impl LogConfig {
-//!     pub fn layer<C>(self) -> Box<dyn Layer<C> + Send + Sync + 'static>
+//!     pub fn layer<S>(self) -> Box<dyn Layer<S> + Send + Sync + 'static>
 //!     where
-//!         C: tracing_core::Subscriber + Send + Sync,
-//!         for<'a> C: LookupSpan<'a>,
+//!         S: tracing_core::Subscriber,
+//!         for<'a> S: LookupSpan<'a>,
 //!     {
 //!         // Shared configuration regardless of where logs are output to.
 //!         let fmt = tracing_subscriber::fmt::layer()