diff --git a/tutorials/lagrangian/porousExplicitSourceReactingParcelFoam/filter/constant/pointMassSourcesProperties b/tutorials/lagrangian/porousExplicitSourceReactingParcelFoam/filter/constant/pointMassSourcesProperties
index 063399d211d5ed531385d746779244fe2a970c8f..2f17b0b095155b651f49dc705e9660b168bd969d 100644
--- a/tutorials/lagrangian/porousExplicitSourceReactingParcelFoam/filter/constant/pointMassSourcesProperties
+++ b/tutorials/lagrangian/porousExplicitSourceReactingParcelFoam/filter/constant/pointMassSourcesProperties
@@ -15,7 +15,7 @@ FoamFile
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
-active          false;
+active          true;
 
 pointSources
 (