diff --git a/src/agenda_culturel/models.py b/src/agenda_culturel/models.py
index 8f63dfe..854e7ed 100644
--- a/src/agenda_culturel/models.py
+++ b/src/agenda_culturel/models.py
@@ -1092,7 +1092,7 @@ class Event(models.Model):
                 .filter(status=Event.STATUS.PUBLISHED)
             )
 
-            if len(self.tags) > 0:
+            if self.tags and len(self.tags) > 0:
                 qs = qs.annotate(
                     overlap_tags=RawSQL(
                         sql="ARRAY(select UNNEST(%s::text[]) INTERSECT select UNNEST(tags))",