diff --git a/src/TurbulenceModels/compressible/turbulentFluidThermoModels/derivedFvPatchFields/turbulentTemperatureRadCoupledMixed/turbulentTemperatureRadCoupledMixedFvPatchScalarField.C b/src/TurbulenceModels/compressible/turbulentFluidThermoModels/derivedFvPatchFields/turbulentTemperatureRadCoupledMixed/turbulentTemperatureRadCoupledMixedFvPatchScalarField.C
index f2629e6f4057ff873d8d42c7b6967db96c872ad4..749831e7045b13d84bb3d7f5d2107146b0a0e16b 100644
--- a/src/TurbulenceModels/compressible/turbulentFluidThermoModels/derivedFvPatchFields/turbulentTemperatureRadCoupledMixed/turbulentTemperatureRadCoupledMixedFvPatchScalarField.C
+++ b/src/TurbulenceModels/compressible/turbulentFluidThermoModels/derivedFvPatchFields/turbulentTemperatureRadCoupledMixed/turbulentTemperatureRadCoupledMixedFvPatchScalarField.C
@@ -339,7 +339,8 @@ void turbulentTemperatureRadCoupledMixedFvPatchScalarField::write
     os.writeKeyword("Tnbr")<< TnbrName_ << token::END_STATEMENT << nl;
     os.writeKeyword("QrNbr")<< QrNbrName_ << token::END_STATEMENT << nl;
     os.writeKeyword("Qr")<< QrName_ << token::END_STATEMENT << nl;
-    os.writeEntry("thermalInertia", thermalInertia_);
+    os.writeKeyword("thermalInertia")<< thermalInertia_
+        << token::END_STATEMENT << nl;
 
     thicknessLayers_.writeEntry("thicknessLayers", os);
     kappaLayers_.writeEntry("kappaLayers", os);