diff --git a/applications/solvers/compressible/rhoSimpleFoam/rhoPorousSimpleFoam/pEqn.H b/applications/solvers/compressible/rhoSimpleFoam/rhoPorousSimpleFoam/pEqn.H
index 229579ea3137548cf6496a9c28d0d19f9db7c065..38e39b9ac503f0e4eed5891be571e16da111fa16 100644
--- a/applications/solvers/compressible/rhoSimpleFoam/rhoPorousSimpleFoam/pEqn.H
+++ b/applications/solvers/compressible/rhoSimpleFoam/rhoPorousSimpleFoam/pEqn.H
@@ -53,8 +53,6 @@
 
         tpEqn().setReference(pRefCell, pRefValue);
 
-        fvOptions.constrain(tpEqn(), rho.name());
-
         tpEqn().solve();
 
         if (simple.finalNonOrthogonalIter())