diff --git a/dumux/freeflow/stokes/localresidual.hh b/dumux/freeflow/stokes/localresidual.hh
index 93b9e4d833c07c703c5ac799a184a87974a2942d..7951945fc9ad49b28c10fef6210f5e3faee809a4 100644
--- a/dumux/freeflow/stokes/localresidual.hh
+++ b/dumux/freeflow/stokes/localresidual.hh
@@ -519,6 +519,7 @@ protected:
             PrimaryVariables values(0.0);
 
             asImp_()->computeFlux(values, boundaryFaceIdx, /*onBoundary=*/true);
+            values *= this->curVolVars_(scvIdx).extrusionFactor();
             Valgrind::CheckDefined(values);
 
             for (int eqIdx = 0; eqIdx < numEq; ++eqIdx)