diff --git a/api/funkwhale_api/music/models.py b/api/funkwhale_api/music/models.py
index fd577427c..6b7ef5504 100644
--- a/api/funkwhale_api/music/models.py
+++ b/api/funkwhale_api/music/models.py
@@ -850,7 +850,7 @@ class Upload(models.Model):
     )
     playlist_libraries = models.ManyToManyField(
         "library",
-        null=True,
+        blank=True,
         related_name="playlist_uploads",
     )