diff --git a/Nef_3/include/CGAL/Nef_3/K3_tree.h b/Nef_3/include/CGAL/Nef_3/K3_tree.h
index a0d5c117118..03114d47f8a 100644
--- a/Nef_3/include/CGAL/Nef_3/K3_tree.h
+++ b/Nef_3/include/CGAL/Nef_3/K3_tree.h
@@ -146,7 +146,7 @@ public:
   }
 
   void transform(const Aff_transformation_3& t) {
-      transform(t, t.is_even(), t.transposed_inverse());
+      transform(t, t.is_even(), t.transpose().inverse());
   }
 
   void add_facet(Halffacet_handle f, int depth) {