diff --git a/tutorials/cfdemSolverRhoPimpleChem/Spreitzer_FluidBedCases/Spreitzer_R2/DEM/in.liggghts_run b/tutorials/cfdemSolverRhoPimpleChem/Spreitzer_FluidBedCases/Spreitzer_R2/DEM/in.liggghts_run
index 80752548..9b38db60 100644
--- a/tutorials/cfdemSolverRhoPimpleChem/Spreitzer_FluidBedCases/Spreitzer_R2/DEM/in.liggghts_run
+++ b/tutorials/cfdemSolverRhoPimpleChem/Spreitzer_FluidBedCases/Spreitzer_R2/DEM/in.liggghts_run
@@ -12,7 +12,7 @@ boundary        f f f
 newton          off
 
 units           si
-processors      4 1 2
+processors      * 1 2
 
 # read the restart file
 read_restart    ../DEM/post/restart/liggghts.restart