diff --git a/pages/merlin6/05 Software Support/openmpi.md b/pages/merlin6/05 Software Support/openmpi.md
index 4647f2f..794bd8c 100644
--- a/pages/merlin6/05 Software Support/openmpi.md	
+++ b/pages/merlin6/05 Software Support/openmpi.md	
@@ -67,7 +67,7 @@ This can be also added externally before the **mpirun** call (see below example)
   export UCX_LOG_LEVEL=data
   export UCX_LOG_FILE=UCX-$SLURM_JOB_ID.log
 
-  mpirun -no $SLURM_NTASKS ./app
+  mpirun -np $SLURM_NTASKS ./app
   ```
 
 ## Supported OpenMPI versions