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-rw-r--r--unsupported/test/FFT.cpp5
1 files changed, 5 insertions, 0 deletions
diff --git a/unsupported/test/FFT.cpp b/unsupported/test/FFT.cpp
index 32d1393d0..28230e1c4 100644
--- a/unsupported/test/FFT.cpp
+++ b/unsupported/test/FFT.cpp
@@ -23,6 +23,11 @@
// Eigen. If not, see <http://www.gnu.org/licenses/>.
#include "main.h"
+//#define USE_FFTW
+#ifdef USE_FFTW
+#include <fftw3.h>
+#endif
+
#include <unsupported/Eigen/FFT>
using namespace std;