diff --git a/src/openMVG/multiview/solver_fundamental_kernel.cpp b/src/openMVG/multiview/solver_fundamental_kernel.cpp
index 2ffd45a..bbf74b4 100644
--- a/src/openMVG/multiview/solver_fundamental_kernel.cpp
+++ b/src/openMVG/multiview/solver_fundamental_kernel.cpp
@@ -110,7 +110,7 @@ void EightPointSolver::Solve
                          x2.colwise().homogeneous(),
                          &epipolar_constraint);
   // Find the F matrice in the nullspace of epipolar_constraint.
-  Eigen::SelfAdjointEigenSolver<Mat9> solver
+  Eigen::SelfAdjointEigenSolver<Eigen::Matrix<double, 9, 9>> solver
     (epipolar_constraint.transpose() * epipolar_constraint);
   f = solver.eigenvectors().leftCols<1>();