diff --git a/apps/enm/services.py b/apps/enm/services.py
index bf74f777..86fdff79 100644
--- a/apps/enm/services.py
+++ b/apps/enm/services.py
@@ -21,7 +21,7 @@ myLogger = logging.getLogger("log")
 def db_insert_mplogx_batch(rows):
     for row in rows:
         _, tag_val, tag_code, tag_update = row
-        if isinstance(tag_update, datetime):
+        if tag_update.tzinfo is None:
             tag_update = timezone.make_aware(tag_update)
         insert_mplogx_item(tag_code, tag_val, tag_update, {})