diff --git a/tvix/nix-compat/src/wire/bytes/reader/mod.rs b/tvix/nix-compat/src/wire/bytes/reader/mod.rs
index 8d4eab78f..3bc8fcf68 100644
--- a/tvix/nix-compat/src/wire/bytes/reader/mod.rs
+++ b/tvix/nix-compat/src/wire/bytes/reader/mod.rs
@@ -93,11 +93,11 @@ where
 
 impl<R: AsyncRead + Unpin> AsyncRead for BytesReader<R> {
     fn poll_read(
-        self: Pin<&mut Self>,
+        mut self: Pin<&mut Self>,
         cx: &mut task::Context,
         buf: &mut ReadBuf,
     ) -> Poll<io::Result<()>> {
-        let this = &mut self.get_mut().state;
+        let this = &mut self.state;
 
         loop {
             match this {
diff --git a/tvix/nix-compat/src/wire/bytes/reader/trailer.rs b/tvix/nix-compat/src/wire/bytes/reader/trailer.rs
index d2b867c2c..1a084d0ee 100644
--- a/tvix/nix-compat/src/wire/bytes/reader/trailer.rs
+++ b/tvix/nix-compat/src/wire/bytes/reader/trailer.rs
@@ -39,11 +39,11 @@ impl<R: AsyncRead + Unpin> TrailerReader<R> {
 
 impl<R: AsyncRead + Unpin> AsyncRead for TrailerReader<R> {
     fn poll_read(
-        self: Pin<&mut Self>,
+        mut self: Pin<&mut Self>,
         cx: &mut task::Context,
         user_buf: &mut ReadBuf,
     ) -> Poll<io::Result<()>> {
-        let this = self.get_mut();
+        let this = &mut *self;
 
         loop {
             match this {