diff --git a/tutorials/heatTransfer/chtMultiRegionSimpleFoam/multiRegionHeaterRadiation/system/bottomAir/changeDictionaryDict b/tutorials/heatTransfer/chtMultiRegionSimpleFoam/multiRegionHeaterRadiation/system/bottomAir/changeDictionaryDict
index 83f882ef9793ea53c58b933a05c67497c076f4ef..fbe09f939ffb44db7b104279d7767061edb731ff 100644
--- a/tutorials/heatTransfer/chtMultiRegionSimpleFoam/multiRegionHeaterRadiation/system/bottomAir/changeDictionaryDict
+++ b/tutorials/heatTransfer/chtMultiRegionSimpleFoam/multiRegionHeaterRadiation/system/bottomAir/changeDictionaryDict
@@ -19,10 +19,16 @@ boundary
     minX
     {
         type            wall;
+        inGroups        2(wall viewFactorWall);
     }
     maxX
     {
         type            wall;
+        inGroups        2(wall viewFactorWall);
+    }
+    ".*"
+    {
+        inGroups        2(wall viewFactorWall);
     }
 }
 
diff --git a/tutorials/heatTransfer/chtMultiRegionSimpleFoam/multiRegionHeaterRadiation/system/topAir/changeDictionaryDict b/tutorials/heatTransfer/chtMultiRegionSimpleFoam/multiRegionHeaterRadiation/system/topAir/changeDictionaryDict
index 2af8a1af98c2469ad1bc81a3f3c15e1311040879..4c1eeba58e98455d0ce842df3f1436f4f75188e5 100644
--- a/tutorials/heatTransfer/chtMultiRegionSimpleFoam/multiRegionHeaterRadiation/system/topAir/changeDictionaryDict
+++ b/tutorials/heatTransfer/chtMultiRegionSimpleFoam/multiRegionHeaterRadiation/system/topAir/changeDictionaryDict
@@ -14,6 +14,14 @@ FoamFile
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
+boundary
+{
+    ".*"
+    {
+        inGroups        2(wall viewFactorWall);
+    }
+}
+
 U
 {
     internalField   uniform (0.1 0 0);