diff --git a/unsupported/Eigen/CXX11/src/ThreadPool/Barrier.h b/unsupported/Eigen/CXX11/src/ThreadPool/Barrier.h
index c37fc1e65..ef5e9ff18 100644
--- a/unsupported/Eigen/CXX11/src/ThreadPool/Barrier.h
+++ b/unsupported/Eigen/CXX11/src/ThreadPool/Barrier.h
@@ -20,9 +20,7 @@ class Barrier {
   Barrier(unsigned int count) : state_(count << 1), notified_(false) {
     eigen_assert(((count << 1) >> 1) == count);
   }
-  ~Barrier() {
-    eigen_assert((state_>>1) == 0);
-  }
+  ~Barrier() { eigen_plain_assert((state_ >> 1) == 0); }
 
   void Notify() {
     unsigned int v = state_.fetch_sub(2, std::memory_order_acq_rel) - 2;
@@ -52,14 +50,13 @@ class Barrier {
   bool notified_;
 };
 
-
 // Notification is an object that allows a user to to wait for another
 // thread to signal a notification that an event has occurred.
 //
 // Multiple threads can wait on the same Notification object,
 // but only one caller must call Notify() on the object.
 struct Notification : Barrier {
-  Notification() : Barrier(1) {};
+  Notification() : Barrier(1){};
 };
 
 }  // namespace Eigen
diff --git a/unsupported/Eigen/CXX11/src/ThreadPool/EventCount.h b/unsupported/Eigen/CXX11/src/ThreadPool/EventCount.h
index 0a7181102..22c952ae1 100644
--- a/unsupported/Eigen/CXX11/src/ThreadPool/EventCount.h
+++ b/unsupported/Eigen/CXX11/src/ThreadPool/EventCount.h
@@ -58,7 +58,7 @@ class EventCount {
 
   ~EventCount() {
     // Ensure there are no waiters.
-    eigen_assert((state_.load() & (kStackMask | kWaiterMask)) == kStackMask);
+    eigen_plain_assert((state_.load() & (kStackMask | kWaiterMask)) == kStackMask);
   }
 
   // Prewait prepares for waiting.
@@ -169,7 +169,8 @@ class EventCount {
 
   class Waiter {
     friend class EventCount;
-    // Align to 128 byte boundary to prevent false sharing with other Waiter objects in the same vector.
+    // Align to 128 byte boundary to prevent false sharing with other Waiter
+    // objects in the same vector.
     EIGEN_ALIGN_TO_BOUNDARY(128) std::atomic<Waiter*> next;
     std::mutex mu;
     std::condition_variable cv;
diff --git a/unsupported/Eigen/CXX11/src/ThreadPool/NonBlockingThreadPool.h b/unsupported/Eigen/CXX11/src/ThreadPool/NonBlockingThreadPool.h
index ede70da8d..354995be8 100644
--- a/unsupported/Eigen/CXX11/src/ThreadPool/NonBlockingThreadPool.h
+++ b/unsupported/Eigen/CXX11/src/ThreadPool/NonBlockingThreadPool.h
@@ -90,8 +90,8 @@ class ThreadPoolTempl : public Eigen::ThreadPoolInterface {
     }
 
     // Join threads explicitly to avoid destruction order issues.
-    for (size_t i = 0; i < num_threads_; i++) delete threads_[i];
-    for (size_t i = 0; i < num_threads_; i++) delete queues_[i];
+    for (int i = 0; i < num_threads_; i++) delete threads_[i];
+    for (int i = 0; i < num_threads_; i++) delete queues_[i];
 #ifndef EIGEN_THREAD_LOCAL
     for (auto it : per_thread_map_) delete it.second;
 #endif
@@ -298,7 +298,7 @@ class ThreadPoolTempl : public Eigen::ThreadPoolInterface {
     // If we are shutting down and all worker threads blocked without work,
     // that's we are done.
     blocked_++;
-    if (done_ && blocked_ == num_threads_) {
+    if (done_ && blocked_ == static_cast<unsigned>(num_threads_)) {
       ec_.CancelWait(waiter);
       // Almost done, but need to re-check queues.
       // Consider that all queues are empty and all worker threads are preempted
diff --git a/unsupported/Eigen/CXX11/src/ThreadPool/RunQueue.h b/unsupported/Eigen/CXX11/src/ThreadPool/RunQueue.h
index cb3690a2e..05c739aa1 100644
--- a/unsupported/Eigen/CXX11/src/ThreadPool/RunQueue.h
+++ b/unsupported/Eigen/CXX11/src/ThreadPool/RunQueue.h
@@ -10,7 +10,6 @@
 #ifndef EIGEN_CXX11_THREADPOOL_RUNQUEUE_H_
 #define EIGEN_CXX11_THREADPOOL_RUNQUEUE_H_
 
-
 namespace Eigen {
 
 // RunQueue is a fixed-size, partially non-blocking deque or Work items.
@@ -47,7 +46,7 @@ class RunQueue {
       array_[i].state.store(kEmpty, std::memory_order_relaxed);
   }
 
-  ~RunQueue() { eigen_assert(Size() == 0); }
+  ~RunQueue() { eigen_plain_assert(Size() == 0); }
 
   // PushFront inserts w at the beginning of the queue.
   // If queue is full returns w, otherwise returns default-constructed Work.
@@ -131,9 +130,8 @@ class RunQueue {
       Elem* e = &array_[mid & kMask];
       uint8_t s = e->state.load(std::memory_order_relaxed);
       if (n == 0) {
-        if (s != kReady ||
-            !e->state.compare_exchange_strong(s, kBusy,
-                                              std::memory_order_acquire))
+        if (s != kReady || !e->state.compare_exchange_strong(
+                               s, kBusy, std::memory_order_acquire))
           continue;
         start = mid;
       } else {