diff --git a/vcg/complex/algorithms/edge_collapse.h b/vcg/complex/algorithms/edge_collapse.h
index 604b4c82..85b8f28e 100644
--- a/vcg/complex/algorithms/edge_collapse.h
+++ b/vcg/complex/algorithms/edge_collapse.h
@@ -31,6 +31,19 @@
 namespace vcg{
 namespace tri{	
 
+template < class VERTEX_TYPE>
+class BasicVertexPair {
+public:
+  inline BasicVertexPair() {};
+  inline BasicVertexPair( VERTEX_TYPE * v0, VERTEX_TYPE * v1){V(0) = v0; V(1) = v1; };
+  void Sort() {if(V(0)<V(0)) std::swap(V(0),V(0)); }
+  VERTEX_TYPE *&V(int i) { return v[i]; }
+  VERTEX_TYPE *cV(int i) const { return v[i]; }
+private:
+  VERTEX_TYPE *v[2];
+};
+
+
 /** \addtogroup trimesh */
 /*@{*/
 /** This a static utility class for the edge collapse.