diff --git a/tutorials/mesh/moveDynamicMesh/SnakeRiverCanyon/constant/dynamicMeshDict b/tutorials/mesh/moveDynamicMesh/SnakeRiverCanyon/constant/dynamicMeshDict
index 534ea483fe..4aaa9e488c 100644
--- a/tutorials/mesh/moveDynamicMesh/SnakeRiverCanyon/constant/dynamicMeshDict
+++ b/tutorials/mesh/moveDynamicMesh/SnakeRiverCanyon/constant/dynamicMeshDict
@@ -23,10 +23,13 @@ motionSolverLibs ("libfvMotionSolvers.so");
 solver displacementSBRStress;   //displacementLaplacian;
 //solver velocityComponentLaplacian z;
 
-//diffusivity  uniform;
-//diffusivity  directional (1 200 0);
-//diffusivity  motionDirectional (1 1000 0);
-//diffusivity  file motionDiffusivity;
-diffusivity  quadratic inverseDistance 1(minZ);
+displacementSBRStressCoeffs
+{
+    // diffusivity  uniform;
+    // diffusivity  directional (1 200 0);
+    // diffusivity  motionDirectional (1 1000 0);
+    // diffusivity  file motionDiffusivity;
+    diffusivity  quadratic inverseDistance 1(minZ);
+}
 
 // ************************************************************************* //