diff --git a/unsupported/Eigen/src/Polynomials/Companion.h b/unsupported/Eigen/src/Polynomials/Companion.h
index e0af6ebe4..87db3f4c5 100644
--- a/unsupported/Eigen/src/Polynomials/Companion.h
+++ b/unsupported/Eigen/src/Polynomials/Companion.h
@@ -89,13 +89,13 @@ class companion
     {
       const Index deg   = m_monic.size();
       const Index deg_1 = deg-1;
-      DenseCompanionMatrixType companion(deg,deg);
-      companion <<
+      DenseCompanionMatrixType companMat(deg,deg);
+      companMat <<
         ( LeftBlock(deg,deg_1)
           << LeftBlockFirstRow::Zero(1,deg_1),
           BottomLeftBlock::Identity(deg-1,deg-1)*m_bl_diag.asDiagonal() ).finished()
         , m_monic;
-      return companion;
+      return companMat;
     }