diff --git a/vcg/complex/algorithms/mesh_to_matrix.h b/vcg/complex/algorithms/mesh_to_matrix.h
index 06ff42f6..96e4a2c1 100644
--- a/vcg/complex/algorithms/mesh_to_matrix.h
+++ b/vcg/complex/algorithms/mesh_to_matrix.h
@@ -28,8 +28,6 @@
 #include <vcg/complex/algorithms/update/quality.h>
 #include <vcg/complex/algorithms/harmonic.h>
 
-using namespace std;
-
 namespace vcg {
 namespace tri {
 template < typename MeshType >