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-rw-r--r--Eigen/src/Eigenvalues/Tridiagonalization.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/Eigen/src/Eigenvalues/Tridiagonalization.h b/Eigen/src/Eigenvalues/Tridiagonalization.h
index 6562ee8fc..e8f0ac5d1 100644
--- a/Eigen/src/Eigenvalues/Tridiagonalization.h
+++ b/Eigen/src/Eigenvalues/Tridiagonalization.h
@@ -26,6 +26,8 @@
#ifndef EIGEN_TRIDIAGONALIZATION_H
#define EIGEN_TRIDIAGONALIZATION_H
+namespace Eigen {
+
namespace internal {
template<typename MatrixType> struct TridiagonalizationMatrixTReturnType;
@@ -565,4 +567,6 @@ template<typename MatrixType> struct TridiagonalizationMatrixTReturnType
} // end namespace internal
+} // end namespace Eigen
+
#endif // EIGEN_TRIDIAGONALIZATION_H