diff --git a/test/porousmediumflow/3p/implicit/infiltration3pproblem.hh b/test/porousmediumflow/3p/implicit/infiltration3pproblem.hh
index 5619947b211d87135b0568ec33c8279da19790a2..67fe2022bf85ef131ec50600b61fa8d0e0c2a063 100644
--- a/test/porousmediumflow/3p/implicit/infiltration3pproblem.hh
+++ b/test/porousmediumflow/3p/implicit/infiltration3pproblem.hh
@@ -28,6 +28,7 @@
 #include <dumux/discretization/cellcentered/tpfa/properties.hh>
 #include <dumux/discretization/box/properties.hh>
 #include <dumux/discretization/methods.hh>
+#include <dumux/io/grid/gridmanager.hh>
 #include <dumux/porousmediumflow/problem.hh>
 #include <dumux/porousmediumflow/3p/model.hh>
 #include <dumux/material/fluidsystems/1pliquid.hh>
diff --git a/tutorial/ex3/2pproblem.hh b/tutorial/ex3/2pproblem.hh
index 7c6681c735e6daa0142870fa6f34408d732a8396..5bf7b35de2368955dd17649a33ed09a961c71b2c 100644
--- a/tutorial/ex3/2pproblem.hh
+++ b/tutorial/ex3/2pproblem.hh
@@ -30,6 +30,9 @@
 //The box discretization
 #include <dumux/discretization/box/properties.hh>
 
+//The grid managers
+#include <dumux/io/grid/gridmanager.hh>
+
 // The base porous media box problem
 #include <dumux/porousmediumflow/problem.hh>