diff --git a/Eigen/src/SparseCore/SparseBlock.h b/Eigen/src/SparseCore/SparseBlock.h
index 86faf5a55..0692eeb1a 100644
--- a/Eigen/src/SparseCore/SparseBlock.h
+++ b/Eigen/src/SparseCore/SparseBlock.h
@@ -522,13 +522,13 @@ public:
 
 namespace internal {
   template<typename XprType, int BlockRows, int BlockCols, bool InnerPanel>
-  class GenericSparseBlockInnerIteratorImpl<XprType,BlockRows,BlockCols,InnerPanel,false> : public Block<XprType, BlockRows, BlockCols, InnerPanel>::_MatrixTypeNested::InnerIterator
+  class GenericSparseBlockInnerIteratorImpl<XprType,BlockRows,BlockCols,InnerPanel,false> : public internal::remove_all<typename XprType::Nested>::type::InnerIterator
   {
     typedef Block<XprType, BlockRows, BlockCols, InnerPanel> BlockType;
     enum {
       IsRowMajor = BlockType::IsRowMajor
     };
-    typedef typename BlockType::_MatrixTypeNested _MatrixTypeNested;
+    typedef typename internal::remove_all<typename XprType::Nested>::type _MatrixTypeNested;
     typedef typename BlockType::Index Index;
     typedef typename _MatrixTypeNested::InnerIterator Base;
     const BlockType& m_block;
@@ -560,7 +560,7 @@ namespace internal {
     enum {
       IsRowMajor = BlockType::IsRowMajor
     };
-    typedef typename BlockType::_MatrixTypeNested _MatrixTypeNested;
+    typedef typename internal::remove_all<typename XprType::Nested>::type _MatrixTypeNested;
     typedef typename BlockType::Index Index;
     typedef typename BlockType::Scalar Scalar;
     const BlockType& m_block;