diff --git a/unsupported/Eigen/CXX11/ThreadPool b/unsupported/Eigen/CXX11/ThreadPool
index 64ea83b7e..1dcc4eb6c 100644
--- a/unsupported/Eigen/CXX11/ThreadPool
+++ b/unsupported/Eigen/CXX11/ThreadPool
@@ -44,6 +44,10 @@
 #include <thread>
 #include <functional>
 #include <memory>
+#include "src/util/CXX11Meta.h"
+#include "src/util/MaxSizeVector.h"
+
+#include "src/ThreadPool/ThreadLocal.h"
 #ifndef EIGEN_THREAD_LOCAL
 // There are non-parenthesized calls to "max" in the  <unordered_map> header,
 // which trigger a check in test/main.h causing compilation to fail.
@@ -54,11 +58,6 @@
 #endif
 #include <unordered_map>
 #endif
-
-#include "src/util/CXX11Meta.h"
-#include "src/util/MaxSizeVector.h"
-
-#include "src/ThreadPool/ThreadLocal.h"
 #include "src/ThreadPool/ThreadYield.h"
 #include "src/ThreadPool/ThreadCancel.h"
 #include "src/ThreadPool/EventCount.h"
diff --git a/unsupported/Eigen/CXX11/src/ThreadPool/ThreadLocal.h b/unsupported/Eigen/CXX11/src/ThreadPool/ThreadLocal.h
index 89ed6e5e5..a41731c34 100644
--- a/unsupported/Eigen/CXX11/src/ThreadPool/ThreadLocal.h
+++ b/unsupported/Eigen/CXX11/src/ThreadPool/ThreadLocal.h
@@ -10,8 +10,6 @@
 #ifndef EIGEN_CXX11_THREADPOOL_THREAD_LOCAL_H
 #define EIGEN_CXX11_THREADPOOL_THREAD_LOCAL_H
 
-#undef EIGEN_THREAD_LOCAL
-
 #if EIGEN_MAX_CPP_VER >= 11 &&                         \
     ((EIGEN_COMP_GNUC && EIGEN_GNUC_AT_LEAST(4, 8)) || \
      __has_feature(cxx_thread_local))