diff --git a/doc/examples/Tutorial_ReductionsVisitorsBroadcasting_maxnorm.cpp b/doc/examples/Tutorial_ReductionsVisitorsBroadcasting_maxnorm.cpp
index cb46887b6..049c747b0 100644
--- a/doc/examples/Tutorial_ReductionsVisitorsBroadcasting_maxnorm.cpp
+++ b/doc/examples/Tutorial_ReductionsVisitorsBroadcasting_maxnorm.cpp
@@ -2,13 +2,14 @@
 #include <Eigen/Dense>
 
 using namespace std;
+using namespace Eigen;
 int main()
 {
-  Eigen::MatrixXf mat(2,4);
+  MatrixXf mat(2,4);
   mat << 1, 2, 6, 9,
          3, 1, 7, 2;
   
-  int   maxIndex;
+  MatrixXf::Index   maxIndex;
   float maxNorm = mat.colwise().sum().maxCoeff(&maxIndex);
   
   std::cout << "Maximum sum at position " << maxIndex << std::endl;