diff --git a/applications/solvers/heatTransfer/buoyantSimpleFoam/pEqn.H b/applications/solvers/heatTransfer/buoyantSimpleFoam/pEqn.H
index 4bbb449df7..11768ea2f6 100644
--- a/applications/solvers/heatTransfer/buoyantSimpleFoam/pEqn.H
+++ b/applications/solvers/heatTransfer/buoyantSimpleFoam/pEqn.H
@@ -21,7 +21,7 @@
             fvm::laplacian(rhorUAf, p) == fvc::div(phi)
         );
 
-        pEqn.setReference(pRefCell, p[pRefCell]);
+        pEqn.setReference(pRefCell, pRefValue);
 
         // retain the residual from the first iteration
         if (nonOrth == 0)