diff --git a/dumux/porousmediumflow/fluxvariablescachefiller.hh b/dumux/porousmediumflow/fluxvariablescachefiller.hh
index 6e53a931c154922e6a874790eb3de4a6b4794dc3..6f7b13970b7624b740c096a548cda690d3f0a18a 100644
--- a/dumux/porousmediumflow/fluxvariablescachefiller.hh
+++ b/dumux/porousmediumflow/fluxvariablescachefiller.hh
@@ -524,7 +524,7 @@ private:
 
     //! Solves the local systems and stores the result in the handles
     template< class InteractionVolume, class DataHandle>
-    void prepareDataHandle_(InteractionVolume& iv, DataHandle& handle, bool forceUpdate)
+    void prepareDataHandle_([[maybe_unused]] InteractionVolume& iv, [[maybe_unused]] DataHandle& handle, [[maybe_unused]] bool forceUpdate)
     {
         // (maybe) solve system subject to intrinsic permeability
         if constexpr (advectionEnabled)