diff --git a/src/turbulenceModels/compressible/RAS/RASModel/RASModel.H b/src/turbulenceModels/compressible/RAS/RASModel/RASModel.H
index 8bfa031882b1cdb9c1834f7ed15ac56483b69780..93dd91ad3ccb65850346c35153bbc2bdb6572385 100644
--- a/src/turbulenceModels/compressible/RAS/RASModel/RASModel.H
+++ b/src/turbulenceModels/compressible/RAS/RASModel/RASModel.H
@@ -233,8 +233,7 @@ public:
         //- Return the effective turbulent temperature diffusivity for a patch
         virtual tmp<scalarField> kappaEff(const label patchI) const
         {
-            return
-                thermo().kappaEff(alphat()().boundaryField()[patchI], patchI);
+            return thermo().kappaEff(alphat(patchI), patchI);
         }
 
         //- Return the effective turbulent thermal diffusivity
@@ -246,8 +245,7 @@ public:
         //- Return the effective turbulent thermal diffusivity for a patch
         virtual tmp<scalarField> alphaEff(const label patchI) const
         {
-            return
-                thermo().alphaEff(alphat()().boundaryField()[patchI], patchI);
+            return thermo().alphaEff(alphat(patchI), patchI);
         }
 
         //- Solve the turbulence equations and correct the turbulence viscosity
diff --git a/src/turbulenceModels/compressible/turbulenceModel/turbulenceModel.H b/src/turbulenceModels/compressible/turbulenceModel/turbulenceModel.H
index 87d283b29ab8d318cb625269052367e219f5a3a2..d48b898887c6be72e36fe04b82d854190d6fccb8 100644
--- a/src/turbulenceModels/compressible/turbulenceModel/turbulenceModel.H
+++ b/src/turbulenceModels/compressible/turbulenceModel/turbulenceModel.H
@@ -212,6 +212,12 @@ public:
         //- Return the turbulence thermal diffusivity
         virtual tmp<volScalarField> alphat() const = 0;
 
+        //- Return the turbulence thermal diffusivity for a patch
+        virtual tmp<scalarField> alphat(const label patchI) const
+        {
+            return alphat()().boundaryField()[patchI];
+        }
+
         //- Return the effective turbulence temperature diffusivity
         virtual tmp<volScalarField> kappaEff() const = 0;