diff --git a/bin/mpirunDebug b/bin/mpirunDebug
index 2376d22601..a62aa93876 100755
--- a/bin/mpirunDebug
+++ b/bin/mpirunDebug
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 #------------------------------------------------------------------------------
 # =========                 |
 # \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox