diff --git a/tools/HPC scripts/gprmax_omp_mpi.sh b/tools/HPC scripts/gprmax_omp_mpi.sh
index 626c46dd..dc1d8599 100644
--- a/tools/HPC scripts/gprmax_omp_mpi.sh	
+++ b/tools/HPC scripts/gprmax_omp_mpi.sh	
@@ -34,4 +34,4 @@ export OMP_NUM_THREADS=16
 
 ### Run gprMax with input file
 cd $HOME/gprMax
-mpiexec -np 11 -x OMP_NUM_THREADS python -m gprMax mymodel.in -n 10 -mpi
\ No newline at end of file
+python -m gprMax mymodel.in -n 10 -mpi 11