diff --git a/src/zasd.py b/src/zasd.py
index f3ea775..3e2d60c 100644
--- a/src/zasd.py
+++ b/src/zasd.py
@@ -121,10 +121,12 @@ def get_snapshot_zfs_name(snapshot):
 
 # Generate ZFS identifier string from arguments
 def make_snapshot_zfs_name(dataset, tag_or_snapshot, serial=None):
+    global config
+
     if serial is None:
         return '{}@{}'.format(dataset, tag_or_snapshot)
     else:
-        return '{}@{}:{}'.format(dataset, tag_or_snapshot, serial)
+        return '{}@{}{}{}'.format(dataset, tag_or_snapshot, config['separator'], serial)
 #
 # Configuration functions