diff --git a/unsupported/Eigen/CXX11/src/ThreadPool/NonBlockingThreadPool.h b/unsupported/Eigen/CXX11/src/ThreadPool/NonBlockingThreadPool.h
index f7e73aabeb..13e6aac27a 100644
--- a/unsupported/Eigen/CXX11/src/ThreadPool/NonBlockingThreadPool.h
+++ b/unsupported/Eigen/CXX11/src/ThreadPool/NonBlockingThreadPool.h
@@ -25,9 +25,9 @@ class NonBlockingThreadPoolTempl : public Eigen::ThreadPoolInterface {
         queues_(num_threads),
         coprimes_(num_threads),
         waiters_(num_threads),
-        blocked_(),
-        spinning_(),
-        done_(),
+        blocked_(0),
+        spinning_(0),
+        done_(false),
         ec_(waiters_) {
     // Calculate coprimes of num_threads.
     // Coprimes are used for a random walk over all threads in Steal
diff --git a/unsupported/Eigen/CXX11/src/ThreadPool/RunQueue.h b/unsupported/Eigen/CXX11/src/ThreadPool/RunQueue.h
index 48de960ae4..05ed76cbe4 100644
--- a/unsupported/Eigen/CXX11/src/ThreadPool/RunQueue.h
+++ b/unsupported/Eigen/CXX11/src/ThreadPool/RunQueue.h
@@ -38,7 +38,7 @@ namespace Eigen {
 template <typename Work, unsigned kSize>
 class RunQueue {
  public:
-  RunQueue() : front_(), back_() {
+  RunQueue() : front_(0), back_(0) {
     // require power-of-two for fast masking
     eigen_assert((kSize & (kSize - 1)) == 0);
     eigen_assert(kSize > 2);            // why would you do this?