diff --git a/Eigen/src/Householder/Householder.h b/Eigen/src/Householder/Householder.h
index 9d33e1e62..32112af9b 100644
--- a/Eigen/src/Householder/Householder.h
+++ b/Eigen/src/Householder/Householder.h
@@ -80,7 +80,7 @@ void MatrixBase<Derived>::makeHouseholder(
   {
     tau = RealScalar(0);
     beta = numext::real(c0);
-    essential.setZero(size()-1);
+    essential.setZero();
   }
   else
   {