diff --git a/dumux/boxmodels/2p2c/2p2clocalresidual.hh b/dumux/boxmodels/2p2c/2p2clocalresidual.hh
index a900efb2be63756b3ea73cd63586d649cb6ff9f4..f7c44860318c6c351dfc65aa8c60225068a3b691 100644
--- a/dumux/boxmodels/2p2c/2p2clocalresidual.hh
+++ b/dumux/boxmodels/2p2c/2p2clocalresidual.hh
@@ -267,7 +267,6 @@ public:
      */
     void computeDiffusiveFlux(PrimaryVariables &flux, const FluxVariables &vars) const
     {
-#if 0
         // add diffusive flux of gas component in liquid phase
         Scalar tmp =
             - vars.porousDiffCoeff(lPhaseIdx) *
@@ -283,7 +282,6 @@ public:
             (vars.molarConcGrad(gPhaseIdx) * vars.face().normal);
         flux[contiLEqIdx] += tmp * FluidSystem::molarMass(lCompIdx);
         flux[contiGEqIdx] -= tmp * FluidSystem::molarMass(gCompIdx);
-#endif
     }
 
     /*!