diff --git a/internal/ceres/concurrent_queue.h b/internal/ceres/concurrent_queue.h
index a04d147..5f490ab 100644
--- a/internal/ceres/concurrent_queue.h
+++ b/internal/ceres/concurrent_queue.h
@@ -1,5 +1,5 @@
 // Ceres Solver - A fast non-linear least squares minimizer
-// Copyright 2018 Google Inc. All rights reserved.
+// Copyright 2023 Google Inc. All rights reserved.
 // http://ceres-solver.org/
 //
 // Redistribution and use in source and binary forms, with or without
@@ -38,8 +38,7 @@
 
 #include "glog/logging.h"
 
-namespace ceres {
-namespace internal {
+namespace ceres::internal {
 
 // A thread-safe multi-producer, multi-consumer queue for queueing items that
 // are typically handled asynchronously by multiple threads. The ConcurrentQueue
@@ -78,7 +77,7 @@
 class ConcurrentQueue {
  public:
   // Defaults the queue to blocking on Wait calls.
-  ConcurrentQueue() : wait_(true) {}
+  ConcurrentQueue() = default;
 
   // Atomically push an element onto the queue.  If a thread was waiting for an
   // element, wake it up.
@@ -149,10 +148,9 @@
   std::queue<T> queue_;
   // If true, signals that callers of Wait will block waiting to pop an
   // element off the queue.
-  bool wait_;
+  bool wait_{true};
 };
 
-}  // namespace internal
-}  // namespace ceres
+}  // namespace ceres::internal
 
 #endif  // CERES_INTERNAL_CONCURRENT_QUEUE_H_