diff --git a/src/thermophysicalModels/radiation/derivedFvPatchFields/MarshakRadiation/MarshakRadiationMixedFvPatchScalarField.H b/src/thermophysicalModels/radiation/derivedFvPatchFields/MarshakRadiation/MarshakRadiationMixedFvPatchScalarField.H
index b4a90987f1..f7faa3f1d0 100644
--- a/src/thermophysicalModels/radiation/derivedFvPatchFields/MarshakRadiation/MarshakRadiationMixedFvPatchScalarField.H
+++ b/src/thermophysicalModels/radiation/derivedFvPatchFields/MarshakRadiation/MarshakRadiationMixedFvPatchScalarField.H
@@ -26,7 +26,8 @@ Class
     Foam::MarshakRadiationFvPatchScalarField
 
 Description
-    Radiation temperature taken from calculated temperaure
+    Marshak boundary for radiation G field
+    - radiation temperature taken from patch value
 
 SourceFiles
     MarshakRadiationFvPatchScalarField.C
diff --git a/src/thermophysicalModels/radiation/derivedFvPatchFields/MarshakRadiationFixedT/MarshakRadiationFixedTMixedFvPatchScalarField.H b/src/thermophysicalModels/radiation/derivedFvPatchFields/MarshakRadiationFixedT/MarshakRadiationFixedTMixedFvPatchScalarField.H
index a983f60b02..49fc1bed67 100644
--- a/src/thermophysicalModels/radiation/derivedFvPatchFields/MarshakRadiationFixedT/MarshakRadiationFixedTMixedFvPatchScalarField.H
+++ b/src/thermophysicalModels/radiation/derivedFvPatchFields/MarshakRadiationFixedT/MarshakRadiationFixedTMixedFvPatchScalarField.H
@@ -26,7 +26,8 @@ Class
     Foam::MarshakRadiationFixedTMixedFvPatchScalarField
 
 Description
-    Radiation temperature specified
+    Marshak boundary for radiation G field
+    - radiation temperature specified
 
 SourceFiles
     MarshakRadiationFixedTMixedFvPatchScalarField.C