diff --git a/src/agenda_culturel/models.py b/src/agenda_culturel/models.py
index 5583b51..c6fe41b 100644
--- a/src/agenda_culturel/models.py
+++ b/src/agenda_culturel/models.py
@@ -967,7 +967,7 @@ class Event(models.Model):
         for attr in Event.data_fields(all=True, local_img=False, exact_location=False):
             values = [getattr(e, attr) for e in events]
             values = ["" if v is None else v for v in values]
-            values = [[] if attr == "tags" and v is "" else v for v in values]
+            values = [[] if attr == "tags" and v == "" else v for v in values]
             # only consider fixed part of Facebook urls
             if attr == "image":
                 values = [v.split("?")[0] if "fbcdn.net" in v else v for v in values]