diff --git a/keystore2/src/apc.rs b/keystore2/src/apc.rs
index 5d2083d..fbf9464 100644
--- a/keystore2/src/apc.rs
+++ b/keystore2/src/apc.rs
@@ -244,7 +244,7 @@
             // If cancelled by the user or if aborted by the client.
             (ResponseCode::CANCELLED, _, _) | (ResponseCode::ABORTED, true, _) => {
                 // Penalize.
-                let mut rate_info = state.rate_limiting.entry(uid).or_default();
+                let rate_info = state.rate_limiting.entry(uid).or_default();
                 rate_info.counter += 1;
                 rate_info.timestamp = start;
             }
diff --git a/keystore2/src/entropy.rs b/keystore2/src/entropy.rs
index de38187..1dcdc86 100644
--- a/keystore2/src/entropy.rs
+++ b/keystore2/src/entropy.rs
@@ -29,7 +29,7 @@
 /// Register the entropy feeder as an idle callback.
 pub fn register_feeder() {
     crate::globals::ASYNC_TASK.add_idle(|shelf| {
-        let mut info = shelf.get_mut::<FeederInfo>();
+        let info = shelf.get_mut::<FeederInfo>();
         let now = Instant::now();
         let feed_needed = match info.last_feed {
             None => true,
diff --git a/keystore2/src/super_key.rs b/keystore2/src/super_key.rs
index 2e8b60f..7fc3ed4 100644
--- a/keystore2/src/super_key.rs
+++ b/keystore2/src/super_key.rs
@@ -823,7 +823,7 @@
         unlocking_sids: &[i64],
     ) {
         log::info!("Locking screen bound for user {} sids {:?}", user_id, unlocking_sids);
-        let mut entry = self.data.user_keys.entry(user_id).or_default();
+        let entry = self.data.user_keys.entry(user_id).or_default();
         if !unlocking_sids.is_empty() {
             if let (Some(aes), Some(ecdh)) = (
                 entry.screen_lock_bound.as_ref().cloned(),
@@ -899,7 +899,7 @@
         db: &mut KeystoreDB,
         user_id: UserId,
     ) -> Result<()> {
-        let mut entry = self.data.user_keys.entry(user_id).or_default();
+        let entry = self.data.user_keys.entry(user_id).or_default();
         if let Some(biometric) = entry.biometric_unlock.as_ref() {
             let (key_id_guard, key_entry) = db
                 .load_key_entry(