diff --git a/pbs-client/src/catalog_shell.rs b/pbs-client/src/catalog_shell.rs
index f53b3cc5..91bed808 100644
--- a/pbs-client/src/catalog_shell.rs
+++ b/pbs-client/src/catalog_shell.rs
@@ -633,7 +633,7 @@ impl Shell {
     /// This assumes that there are no more symlinks in the path stack.
     async fn walk_pxar_archive(
         accessor: &Accessor,
-        mut stack: &mut [PathStackEntry],
+        stack: &mut [PathStackEntry],
     ) -> Result<FileEntry, Error> {
         if stack[0].pxar.is_none() {
             stack[0].pxar = Some(accessor.open_root().await?.lookup_self().await?);
diff --git a/src/api2/backup/environment.rs b/src/api2/backup/environment.rs
index 5291bce8..51f4a15b 100644
--- a/src/api2/backup/environment.rs
+++ b/src/api2/backup/environment.rs
@@ -179,7 +179,7 @@ impl BackupEnvironment {
 
         state.ensure_unfinished()?;
 
-        let mut data = match state.fixed_writers.get_mut(&wid) {
+        let data = match state.fixed_writers.get_mut(&wid) {
             Some(data) => data,
             None => bail!("fixed writer '{}' not registered", wid),
         };
@@ -233,7 +233,7 @@ impl BackupEnvironment {
 
         state.ensure_unfinished()?;
 
-        let mut data = match state.dynamic_writers.get_mut(&wid) {
+        let data = match state.dynamic_writers.get_mut(&wid) {
             Some(data) => data,
             None => bail!("dynamic writer '{}' not registered", wid),
         };
@@ -328,7 +328,7 @@ impl BackupEnvironment {
 
         state.ensure_unfinished()?;
 
-        let mut data = match state.dynamic_writers.get_mut(&wid) {
+        let data = match state.dynamic_writers.get_mut(&wid) {
             Some(data) => data,
             None => bail!("dynamic writer '{}' not registered", wid),
         };
@@ -362,7 +362,7 @@ impl BackupEnvironment {
 
         state.ensure_unfinished()?;
 
-        let mut data = match state.fixed_writers.get_mut(&wid) {
+        let data = match state.fixed_writers.get_mut(&wid) {
             Some(data) => data,
             None => bail!("fixed writer '{}' not registered", wid),
         };