diff --git a/applications/solvers/compressible/rhoSimpleFoam/rhoPorousSimpleFoam/pEqn.H b/applications/solvers/compressible/rhoSimpleFoam/rhoPorousSimpleFoam/pEqn.H
index 229579ea31..38e39b9ac5 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())