diff --git a/tutorials/compressible/rhoPimpleDyMFoam/annularThermalMixer/system/snappyHexMeshDict b/tutorials/compressible/rhoPimpleDyMFoam/annularThermalMixer/system/snappyHexMeshDict
index ea372875da17f872cc4c8e5d5e4c334926798b1c..f211a4aebbf33d648e6a26b4cf36909df506b035 100644
--- a/tutorials/compressible/rhoPimpleDyMFoam/annularThermalMixer/system/snappyHexMeshDict
+++ b/tutorials/compressible/rhoPimpleDyMFoam/annularThermalMixer/system/snappyHexMeshDict
@@ -71,7 +71,7 @@ geometry
     wall.obj
     {
         type        triSurfaceMesh;
-        name        wall;
+        name        walls;
     }
 };
 
@@ -191,7 +191,7 @@ castellatedMeshControls
             faceType baffle;
         }
 
-        wall
+        walls
         {
             level       (1 1);
             patchInfo