diff --git a/CEP/PyBDSM/test/tbdsm_process_image.run b/CEP/PyBDSM/test/tbdsm_process_image.run
index d84c44c9b905b193dac500306b1cdad37110dee3..3617904d3a66edb915bb3d4d058f4e600ee23bd5 100755
--- a/CEP/PyBDSM/test/tbdsm_process_image.run
+++ b/CEP/PyBDSM/test/tbdsm_process_image.run
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/csh
 
 # Set-up the Python environment for running the PyBDSM source finder.
 use Pythonlibs