diff --git a/platform/exec/exec.PIXI_OPENMP b/platform/exec/exec.PIXI_OPENMP
index ce2550ed3..f4f1798b1 100755
--- a/platform/exec/exec.PIXI_OPENMP
+++ b/platform/exec/exec.PIXI_OPENMP
@@ -1,8 +1,8 @@
 #!/bin/sh
-# GACODE Parallel execution script (PIXI)
+# GACODE Parallel execution script (PIXI_OPENMP)
 #
 # NOTES:
-# Used mpich2-1.0.1, so use mpirun rather than mpiexec
+# Used openmpi-5.0.1
 
 simdir=${1}
 nmpi=${2}
@@ -15,5 +15,5 @@ echo $simdir
 
 cd $simdir
  
-mpirun -x OMP_NUM_THREADS=$nomp -np $nmpi $exec
+mpirun -x OMP_NUM_THREADS=$nomp -np $nmpi --oversubscribe $exec