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-rw-r--r--unsupported/test/sparse_lu.cpp1
1 files changed, 1 insertions, 0 deletions
diff --git a/unsupported/test/sparse_lu.cpp b/unsupported/test/sparse_lu.cpp
index bdf79ca23..75aa7a924 100644
--- a/unsupported/test/sparse_lu.cpp
+++ b/unsupported/test/sparse_lu.cpp
@@ -23,6 +23,7 @@
// Eigen. If not, see <http://www.gnu.org/licenses/>.
#include "sparse.h"
+#include <Eigen/SparseExtra>
#ifdef EIGEN_UMFPACK_SUPPORT
#include <Eigen/UmfPackSupport>