diff --git a/Eigen/src/Core/products/Parallelizer.h b/Eigen/src/Core/products/Parallelizer.h
index 4079063eb..126cfbbff 100644
--- a/Eigen/src/Core/products/Parallelizer.h
+++ b/Eigen/src/Core/products/Parallelizer.h
@@ -129,7 +129,7 @@ void parallelize_gemm(const Functor& func, Index rows, Index cols, bool transpos
   Index blockRows = (rows / threads);
   blockRows = (blockRows/Functor::Traits::mr)*Functor::Traits::mr;
   
-  GemmParallelInfo<Index>* info = new GemmParallelInfo<Index>[threads];
+  ei_declare_aligned_stack_constructed_variable(GemmParallelInfo<Index>,info,threads,0);
 
   #pragma omp parallel num_threads(threads)
   {
@@ -146,8 +146,6 @@ void parallelize_gemm(const Functor& func, Index rows, Index cols, bool transpos
     if(transpose) func(c0, actualBlockCols, 0, rows, info);
     else          func(0, rows, c0, actualBlockCols, info);
   }
-
-  delete[] info;
 #endif
 }
 
diff --git a/Eigen/src/OrderingMethods/Amd.h b/Eigen/src/OrderingMethods/Amd.h
index 41b4fd7e3..ce7c0bbf3 100644
--- a/Eigen/src/OrderingMethods/Amd.h
+++ b/Eigen/src/OrderingMethods/Amd.h
@@ -106,7 +106,8 @@ void minimum_degree_ordering(SparseMatrix<Scalar,ColMajor,Index>& C, Permutation
   t = cnz + cnz/5 + 2*n;                 /* add elbow room to C */
   C.resizeNonZeros(t);
   
-  Index* W       = new Index[8*(n+1)]; /* get workspace */
+  // get workspace
+  ei_declare_aligned_stack_constructed_variable(Index,W,8*(n+1),0);
   Index* len     = W;
   Index* nv      = W +   (n+1);
   Index* next    = W + 2*(n+1);
@@ -424,8 +425,6 @@ void minimum_degree_ordering(SparseMatrix<Scalar,ColMajor,Index>& C, Permutation
   }
   
   perm.indices().conservativeResize(n);
-
-  delete[] W;
 }
 
 } // namespace internal