diff --git a/Optimal_transportation_reconstruction_2/demo/Optimal_transportation_reconstruction_2/glviewer.cpp b/Optimal_transportation_reconstruction_2/demo/Optimal_transportation_reconstruction_2/glviewer.cpp
index 11d8df6ce78..b2cc6605505 100644
--- a/Optimal_transportation_reconstruction_2/demo/Optimal_transportation_reconstruction_2/glviewer.cpp
+++ b/Optimal_transportation_reconstruction_2/demo/Optimal_transportation_reconstruction_2/glviewer.cpp
@@ -10,6 +10,7 @@ GlViewer::GlViewer(QWidget *pParent)
   m_scene = NULL;
 
   m_view_points         = true;
+  m_view_tolerance      = false;
   m_view_vertices       = true;
   m_view_edges          = false;
   m_view_ghost_edges    = false;