diff --git a/library/std/src/sys/pal/wasi/fs.rs b/library/std/src/sys/pal/wasi/fs.rs
index 7705e7f6b88..faf3edd5da6 100644
--- a/library/std/src/sys/pal/wasi/fs.rs
+++ b/library/std/src/sys/pal/wasi/fs.rs
@@ -183,7 +183,7 @@ impl Iterator for ReadDir {
 
     fn next(&mut self) -> Option<io::Result<DirEntry>> {
         match &mut self.state {
-            ReadDirState::FillBuffer { next_read_offset, ref mut buf } => {
+            ReadDirState::FillBuffer { next_read_offset, buf } => {
                 let result = self.inner.dir.fd.readdir(buf, *next_read_offset);
                 match result {
                     Ok(read_bytes) => {
@@ -207,7 +207,7 @@ impl Iterator for ReadDir {
                     }
                 }
             }
-            ReadDirState::ProcessEntry { ref mut buf, next_read_offset, offset } => {
+            ReadDirState::ProcessEntry { buf, next_read_offset, offset } => {
                 let contents = &buf[*offset..];
                 const DIRENT_SIZE: usize = crate::mem::size_of::<wasi::Dirent>();
                 if contents.len() >= DIRENT_SIZE {