diff --git a/dumux/freeflow/navierstokes/slipcondition.hh b/dumux/freeflow/navierstokes/slipcondition.hh
index 24f2144854539cc5d9b0d637564aa662ece8928c..4416df9e217aff12e18d5c0b8adc83e4cccd0637 100644
--- a/dumux/freeflow/navierstokes/slipcondition.hh
+++ b/dumux/freeflow/navierstokes/slipcondition.hh
@@ -12,7 +12,9 @@
 #ifndef DUMUX_FREEFLOW_NAVIERSTOKES_SLIPCONDITION_HH
 #define DUMUX_FREEFLOW_NAVIERSTOKES_SLIPCONDITION_HH
 
+#include <dune/common/fvector.hh>
 #include <dumux/common/tag.hh>
+#include <dumux/common/parameters.hh>
 #include <dumux/discretization/method.hh>
 
 namespace Dumux::NavierStokes::SlipConditions {