Remove "using namespace Eigen" from blas/common.h.
diff --git a/lapack/eigenvalues.inc b/lapack/eigenvalues.inc
index 6f168de..211a7ff 100644
--- a/lapack/eigenvalues.inc
+++ b/lapack/eigenvalues.inc
@@ -47,9 +47,10 @@
     mat = matrix(a, *n, *n, *lda);
 
   bool computeVectors = *jobz == 'V' || *jobz == 'v';
-  SelfAdjointEigenSolver<PlainMatrixType> eig(mat, computeVectors ? ComputeEigenvectors : EigenvaluesOnly);
+  Eigen::SelfAdjointEigenSolver<PlainMatrixType> eig(
+      mat, computeVectors ? Eigen::ComputeEigenvectors : Eigen::EigenvaluesOnly);
 
-  if (eig.info() == NoConvergence) {
+  if (eig.info() == Eigen::NoConvergence) {
     make_vector(w, *n).setZero();
     if (computeVectors) matrix(a, *n, *n, *lda).setIdentity();
     //*info = 1;