diff --git a/bin/prepare_minion.py b/bin/prepare_minion.py
index 92d45c5..2b0ac0f 100755
--- a/bin/prepare_minion.py
+++ b/bin/prepare_minion.py
@@ -15,7 +15,7 @@ mypwd = os.getcwd()
 formulasfile = 'formulas.yaml'
 formulasdir = '/srv/formulas'
 
-configdata = {'file_roots': {'production': ['/srv/salt']}}
+configdata = {'file_roots': {'production': ['/srv/salt']}, 'pillar_merge_lists': True}
 grainsdata = {'roles': roles}
 
 with open(grainsfile, mode='w') as grainsfh: