diff --git a/src/thermophysicalModels/radiation/radiationModel/radiationModel/radiationModel.C b/src/thermophysicalModels/radiation/radiationModel/radiationModel/radiationModel.C
index 2aaa7d7e67..be93dc011e 100644
--- a/src/thermophysicalModels/radiation/radiationModel/radiationModel/radiationModel.C
+++ b/src/thermophysicalModels/radiation/radiationModel/radiationModel/radiationModel.C
@@ -27,7 +27,7 @@ License
 #include "radiationModel.H"
 #include "absorptionEmissionModel.H"
 #include "scatterModel.H"
-#include "fvm.H"
+#include "fvmSup.H"
 
 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //
 
@@ -112,6 +112,9 @@ bool Foam::radiation::radiationModel::read()
         lookup("radiation") >> radiation_;
         coeffs_ = subDict(type() + "Coeffs");
 
+        lookup("solverFreq") >> solverFreq_,
+        solverFreq_ = max(1, solverFreq_);
+
         return true;
     }
     else