diff --git a/bench/benchFFT.cpp b/bench/benchFFT.cpp
index 84cc49f..ffa4fff 100644
--- a/bench/benchFFT.cpp
+++ b/bench/benchFFT.cpp
@@ -26,7 +26,7 @@
 #include <vector>
 #include <Eigen/Core>
 #include <bench/BenchTimer.h>
-#include <unsupported/Eigen/FFT.h>
+#include <unsupported/Eigen/FFT>
 
 using namespace Eigen;
 using namespace std;
diff --git a/unsupported/Eigen/FFT.h b/unsupported/Eigen/FFT
similarity index 86%
rename from unsupported/Eigen/FFT.h
rename to unsupported/Eigen/FFT
index c466423..3d852f5 100644
--- a/unsupported/Eigen/FFT.h
+++ b/unsupported/Eigen/FFT
@@ -25,28 +25,28 @@
 #ifndef EIGEN_FFT_H
 #define EIGEN_FFT_H
 
-// simple_fft_traits:  small, free, reasonably efficient default, derived from kissfft
-#include "src/FFT/simple_fft_traits.h"
-#define DEFAULT_FFT_TRAITS simple_fft_traits
+// ei_kissfft_impl:  small, free, reasonably efficient default, derived from kissfft
+#include "src/FFT/ei_kissfft_impl.h"
+#define DEFAULT_FFT_IMPL ei_kissfft_impl
 
 // FFTW: faster, GPL-not LGPL, bigger code size
 #ifdef FFTW_PATIENT  // definition of FFTW_PATIENT indicates the caller has included fftw3.h, we can use FFTW routines
 // TODO 
-// #include "src/FFT/fftw_traits.h"
-// #define DEFAULT_FFT_TRAITS fftw_traits
+// #include "src/FFT/ei_fftw_impl.h"
+// #define DEFAULT_FFT_IMPL ei_fftw_impl
 #endif
 
 // intel Math Kernel Library: fastest, commerical
 #ifdef _MKL_DFTI_H_ // mkl_dfti.h has been included, we can use MKL FFT routines
 // TODO 
-// #include "src/FFT/imkl_traits.h"
-// #define DEFAULT_FFT_TRAITS imkl_traits
+// #include "src/FFT/ei_imkl_impl.h"
+// #define DEFAULT_FFT_IMPL ei_imkl_impl
 #endif
 
 namespace Eigen {
 
 template <typename _Scalar,
-         typename _Traits=DEFAULT_FFT_TRAITS<_Scalar> 
+         typename _Traits=DEFAULT_FFT_IMPL<_Scalar> 
          >
 class FFT
 {
@@ -90,6 +90,6 @@
   private:
     traits_type m_traits;
 };
-#undef DEFAULT_FFT_TRAITS
+#undef DEFAULT_FFT_IMPL
 }
 #endif
diff --git a/unsupported/Eigen/src/FFT/simple_fft_traits.h b/unsupported/Eigen/src/FFT/ei_kissfft_impl.h
similarity index 95%
rename from unsupported/Eigen/src/FFT/simple_fft_traits.h
rename to unsupported/Eigen/src/FFT/ei_kissfft_impl.h
index 1e2be8f..ce2c9f1 100644
--- a/unsupported/Eigen/src/FFT/simple_fft_traits.h
+++ b/unsupported/Eigen/src/FFT/ei_kissfft_impl.h
@@ -24,16 +24,15 @@
 
 #include <complex>
 #include <vector>
-#include <iostream>
 
 namespace Eigen {
 
   template <typename _Scalar>
-  struct simple_fft_traits
+  struct ei_kissfft_impl
   {
     typedef _Scalar Scalar;
     typedef std::complex<Scalar> Complex;
-    simple_fft_traits() : m_nfft(0) {} 
+    ei_kissfft_impl() : m_nfft(0) {} 
 
     template <typename _Src>
     void fwd( Complex * dst,const _Src *src,int nfft)
@@ -370,5 +369,29 @@
     std::vector<Complex> m_realTwiddles;
     std::vector<int> m_stageRadix;
     std::vector<int> m_stageRemainder;
+/*
+    enum {FORWARD,INVERSE,REAL,COMPLEX};
+
+    struct PlanKey
+    {
+        PlanKey(int nfft,bool isinverse,bool iscomplex)
+        {
+            _key = (nfft<<2) | (isinverse<<1) | iscomplex;
+        }
+
+        bool operator<(const PlanKey & other) const
+        {
+            return this->_key < other._key;
+        }
+        int _key;
+    };
+
+    struct PlanData
+    {
+        std::vector<Complex> m_twiddles;
+    };
+
+    std::map<PlanKey,
+*/
   };
 }
diff --git a/unsupported/test/FFT.cpp b/unsupported/test/FFT.cpp
index 75c3327..daf3977 100644
--- a/unsupported/test/FFT.cpp
+++ b/unsupported/test/FFT.cpp
@@ -23,8 +23,7 @@
 // Eigen. If not, see <http://www.gnu.org/licenses/>.
 
 #include "main.h"
-#include <unsupported/Eigen/FFT.h>
-
+#include <unsupported/Eigen/FFT>
 
 using namespace std;