diff --git a/src/thermophysicalModels/radiationModels/radiationModel/fvDOM/fvDOM/fvDOM.C b/src/thermophysicalModels/radiationModels/radiationModel/fvDOM/fvDOM/fvDOM.C
index b147a9f7ed..4217231ce8 100644
--- a/src/thermophysicalModels/radiationModels/radiationModel/fvDOM/fvDOM/fvDOM.C
+++ b/src/thermophysicalModels/radiationModels/radiationModel/fvDOM/fvDOM/fvDOM.C
@@ -182,7 +182,7 @@ void Foam::radiation::fvDOM::initialise()
 
             forAll(IRay_, rayId)
             {
-                const surfaceScalarField Ji = IRay_[rayId].dAve() & mesh_.Sf();
+                const surfaceScalarField Ji(IRay_[rayId].dAve() & mesh_.Sf());
                 const volScalarField& iRayLambdaI =
                     IRay_[rayId].ILambda(lambdaI);