diff --git a/vcg/complex/tetramesh/edge_split.h b/vcg/complex/tetramesh/edge_split.h
index bf560018..d4e6c16d 100644
--- a/vcg/complex/tetramesh/edge_split.h
+++ b/vcg/complex/tetramesh/edge_split.h
@@ -22,10 +22,14 @@
 ****************************************************************************/
 /****************************************************************************
   History
+
 ****************************************************************************/
+#ifndef __VCG_TETRA_EDGE_SPLIT
+#define __VCG_TETRA_EDGE_SPLIT
 
 #include <vcg/simplex/tetrahedron/pos.h>
 #include <vcg/complex/tetramesh/allocate.h>
+#include <vcg/complex/tetramesh/update/topology.h>
 #include <vcg/space/tetra3.h>
 namespace vcg{
 namespace tetra{
@@ -470,4 +474,5 @@ VertexType* DoSplit(TetraMeshType &tm,TetraType *t,int edge,double alfa)
 };//end class
 
 }//end namespace tetra
-}//end namespace vcg
\ No newline at end of file
+}//end namespace vcg
+#endif
\ No newline at end of file