diff --git a/Eigen/src/Core/CwiseBinaryOp.h b/Eigen/src/Core/CwiseBinaryOp.h
index fc455350c..df13d3aad 100644
--- a/Eigen/src/Core/CwiseBinaryOp.h
+++ b/Eigen/src/Core/CwiseBinaryOp.h
@@ -123,14 +123,14 @@ class CwiseBinaryOp : ei_no_assignment_operator,
 
     EIGEN_STRONG_INLINE int rows() const {
       // return the fixed size type if available to enable compile time optimizations
-      if (ei_traits<ei_cleantype<LhsNested>::type>::RowsAtCompileTime==Dynamic)      
+      if (ei_traits<typename ei_cleantype<LhsNested>::type>::RowsAtCompileTime==Dynamic)      
         return m_rhs.rows();
       else
         return m_lhs.rows();
     }
     EIGEN_STRONG_INLINE int cols() const {
       // return the fixed size type if available to enable compile time optimizations
-      if (ei_traits<ei_cleantype<LhsNested>::type>::ColsAtCompileTime==Dynamic)      
+      if (ei_traits<typename ei_cleantype<LhsNested>::type>::ColsAtCompileTime==Dynamic)      
         return m_rhs.cols();
       else
         return m_lhs.cols();