diff --git a/src/thermophysicalModels/radiation/radiationModels/fvDOM/fvDOM/fvDOM.H b/src/thermophysicalModels/radiation/radiationModels/fvDOM/fvDOM/fvDOM.H
index 546fa51195..5ce925904c 100644
--- a/src/thermophysicalModels/radiation/radiationModels/fvDOM/fvDOM/fvDOM.H
+++ b/src/thermophysicalModels/radiation/radiationModels/fvDOM/fvDOM/fvDOM.H
@@ -128,7 +128,7 @@ class fvDOM
         scalar convergence_;
 
         //- Maximum number of iterations
-        scalar maxIter_;
+        label maxIter_;
 
         //- List of cached fvMatrices for rays
         List<PtrList<fvScalarMatrix>>fvRayDiv_;