diff --git a/applications/solvers/heatTransfer/buoyantBoussinesqSimpleFoam/TEqn.H b/applications/solvers/heatTransfer/buoyantBoussinesqSimpleFoam/TEqn.H
index faddea825b..d00f0877ea 100644
--- a/applications/solvers/heatTransfer/buoyantBoussinesqSimpleFoam/TEqn.H
+++ b/applications/solvers/heatTransfer/buoyantBoussinesqSimpleFoam/TEqn.H
@@ -2,7 +2,7 @@
     volScalarField kappaEff
     (
         "kappaEff",
-        turbulence->nu() + turbulence->nut()/Pr
+        turbulence->nu() + turbulence->nut()/Prt
     );
 
     fvScalarMatrix TEqn
diff --git a/applications/solvers/heatTransfer/buoyantBoussinesqSimpleFoam/readTransportProperties.H b/applications/solvers/heatTransfer/buoyantBoussinesqSimpleFoam/readTransportProperties.H
index eeaa44e155..585128dfde 100644
--- a/applications/solvers/heatTransfer/buoyantBoussinesqSimpleFoam/readTransportProperties.H
+++ b/applications/solvers/heatTransfer/buoyantBoussinesqSimpleFoam/readTransportProperties.H
@@ -9,5 +9,5 @@
     // reference kinematic pressure [m2/s2]
     dimensionedScalar pRef(laminarTransport.lookup("pRef"));
 
-    // Prandtl number
-    dimensionedScalar Pr(laminarTransport.lookup("Pr"));
+    // turbulent Prandtl number
+    dimensionedScalar Prt(laminarTransport.lookup("Prt"));