diff --git a/hooks/ceph_hooks.py b/hooks/ceph_hooks.py
index f777036043afe38be990239312e61096003a16a8..83f8b15974c005d25e173f04a1e54509896a7fce 100755
--- a/hooks/ceph_hooks.py
+++ b/hooks/ceph_hooks.py
@@ -574,7 +574,7 @@ CEPH_PERSITENT_STORTAGE_RULES = '/lib/udev/rules.d/60-persistent-storage.rules'
 
 def patch_persistent_storage_rules():
     if os.path.isfile(CEPH_PERSITENT_STORTAGE_RULES):
-        check_call(['sed', '-i', 's/KERNEL!="loop/KERNEL!="dm*|loop'])
+        check_call(['sed', '-i', 's/KERNEL!="loop/KERNEL!="dm*|loop/'])
         log('Updated %s' % CEPH_PERSITENT_STORTAGE_RULES)
     else:
         log('Missing %s' % CEPH_PERSITENT_STORTAGE_RULES)