diff --git a/Surface_mesher/demo/Surface_mesher/debug_macros.h b/Surface_mesher/demo/Surface_mesher/debug_macros.h
index 4c1a1b485f8..7f6215f1711 100644
--- a/Surface_mesher/demo/Surface_mesher/debug_macros.h
+++ b/Surface_mesher/demo/Surface_mesher/debug_macros.h
@@ -6,6 +6,8 @@
 // #define CGAL_MESHES_DEBUG_REFINEMENT_POINTS
 // #define CGAL_DEBUG_OCTREE_CONSTRUCTION
 
+#define CGAL_MESHES_NO_OUTPUT
+
 // not debugging macros
 // #define CGAL_C2T3_USE_POLYHEDRON
 #define CGAL_C2T3_USE_FILE_WRITER_OFF