diff --git a/tutorials/Lagrangian/coalChemistryFoam/simplifiedSiwek/constant/coalCloud1Properties b/tutorials/Lagrangian/coalChemistryFoam/simplifiedSiwek/constant/coalCloud1Properties
index 4886a81f6f..4184f29b98 100644
--- a/tutorials/Lagrangian/coalChemistryFoam/simplifiedSiwek/constant/coalCloud1Properties
+++ b/tutorials/Lagrangian/coalChemistryFoam/simplifiedSiwek/constant/coalCloud1Properties
@@ -33,6 +33,8 @@ DevolatilisationModel ConstantRateDevolatilisation;
 
 SurfaceReactionModel COxidationDiffusionLimitedRate;
 
+PostProcessingModel none;
+
 radiation       on;
 
 coupled         true;