diff --git a/Surface_mesher/demo/Surface_mesher/qt4-demo/binary_image.h b/Surface_mesher/demo/Surface_mesher/qt4-demo/binary_image.h
index 28581794ff1..2a162a825c9 100644
--- a/Surface_mesher/demo/Surface_mesher/qt4-demo/binary_image.h
+++ b/Surface_mesher/demo/Surface_mesher/qt4-demo/binary_image.h
@@ -170,7 +170,6 @@ public:
     const float z = static_cast<float>(CGAL::to_double(p.z()));
       
     if(interpolation()) {
-      std::cerr << "interpolation\n";
       if(inside(x,y,z))
 	return FT(::trilinear_interpolation(image_ptr.get(),x,y,z));
       else