diff --git a/exercises/exercise-biomineralization/biominproblem.hh b/exercises/exercise-biomineralization/biominproblem.hh
index 489d26576f5f77b491a31a52a176463debffecfc..969deed2836dcd04e5bf8df7ab85f6dacb36f04a 100644
--- a/exercises/exercise-biomineralization/biominproblem.hh
+++ b/exercises/exercise-biomineralization/biominproblem.hh
@@ -62,16 +62,8 @@ template<class TypeTag>
 struct Problem<TypeTag, TTag::ExerciseFourBioMin> { using type = ExerciseFourBioMinProblem<TypeTag>; };
 
 //! Set grid and the grid creator to be used
-#if HAVE_DUNE_ALUGRID
-template<class TypeTag>
-struct Grid<TypeTag, TTag::ExerciseFourBioMin> { using type = Dune::ALUGrid</*dim=*/2, 2, Dune::cube, Dune::nonconforming>; };
-#elif HAVE_UG
-template<class TypeTag>
-struct Grid<TypeTag, TTag::ExerciseFourBioMin> { using type = Dune::UGGrid<2>; };
-#else
 template<class TypeTag>
 struct Grid<TypeTag, TTag::ExerciseFourBioMin> { using type = Dune::YaspGrid<2>; };
-#endif // HAVE_DUNE_ALUGRID
 
 //! Set the fluid system type
 template<class TypeTag>
diff --git a/exercises/solution/exercise-biomineralization/biominproblem.hh b/exercises/solution/exercise-biomineralization/biominproblem.hh
index 672b544f177e1411734e508208bd7ef56cf617b7..44b05db82a8f2efd900e2f5480f2b1ee8064e435 100644
--- a/exercises/solution/exercise-biomineralization/biominproblem.hh
+++ b/exercises/solution/exercise-biomineralization/biominproblem.hh
@@ -63,16 +63,8 @@ template<class TypeTag>
 struct Problem<TypeTag, TTag::ExerciseFourBioMin> { using type = ExerciseFourBioMinProblem<TypeTag>; };
 
 //! Set grid and the grid creator to be used
-#if HAVE_DUNE_ALUGRID
-template<class TypeTag>
-struct Grid<TypeTag, TTag::ExerciseFourBioMin> { using type = Dune::ALUGrid</*dim=*/2, 2, Dune::cube, Dune::nonconforming>; };
-#elif HAVE_UG
-template<class TypeTag>
-struct Grid<TypeTag, TTag::ExerciseFourBioMin> { using type = Dune::UGGrid<2>; };
-#else
 template<class TypeTag>
 struct Grid<TypeTag, TTag::ExerciseFourBioMin> { using type = Dune::YaspGrid<2>; };
-#endif // HAVE_DUNE_ALUGRID
 
 //! Set the fluid system type
 template<class TypeTag>