diff --git a/vcg/simplex/face/component_ocf.h b/vcg/simplex/face/component_ocf.h
index 10d6184f..5f34798f 100644
--- a/vcg/simplex/face/component_ocf.h
+++ b/vcg/simplex/face/component_ocf.h
@@ -765,7 +765,7 @@ public:
 
   } // end namespace face
   
-  template < class, class,class > class TriMesh;
+  template < class, class,class,class > class TriMesh;
 
   namespace tri
   {