diff --git a/dumux/io/interfacegridcreator.hh b/dumux/io/interfacegridcreator.hh
index d17952ecc624f796bea529ccbacf35852c1e57f4..ea50d14565e1a3e0f8e07c59fd19d257cd6538c6 100644
--- a/dumux/io/interfacegridcreator.hh
+++ b/dumux/io/interfacegridcreator.hh
@@ -25,6 +25,8 @@
 #ifndef DUMUX_INTERFACEGRIDCREATOR_HH
 #define DUMUX_INTERFACEGRIDCREATOR_HH
 
+#warning This file is deprecated and will be removed after Dumux 2.9. Use the grid template "Dune::YaspGrid<dim, Dune::TensorProductCoordinates<Scalar, dim> >" instead.
+
 #include <dune/grid/common/gridfactory.hh>
 #include <dune/grid/io/file/dgfparser/dgfyasp.hh>
 #include <dune/grid/utility/structuredgridfactory.hh>