diff --git a/dumux/boxmodels/2pni/2pniproblem.hh b/dumux/boxmodels/2pni/2pniproblem.hh
index 5f734f63b3e01c9908b1c2fa7036d31f502079d2..84d66064c888b944457b949ad089fe6be702c2ad 100644
--- a/dumux/boxmodels/2pni/2pniproblem.hh
+++ b/dumux/boxmodels/2pni/2pniproblem.hh
@@ -53,6 +53,7 @@ public:
      * \param timeManager The time manager
      * \param gridView The grid view
         */
+    DUNE_DEPRECATED_MSG("use PorousMediaBoxProblem instead")
     TwoPNIProblem(TimeManager &timeManager, const GridView &gridView)
         : ParentType(timeManager, gridView)
     {}