diff --git a/src/accounts/migrations/0007_remove_at_from_username.py b/src/accounts/migrations/0007_remove_at_from_username.py
index 6ab6485..e191d8e 100644
--- a/src/accounts/migrations/0007_remove_at_from_username.py
+++ b/src/accounts/migrations/0007_remove_at_from_username.py
@@ -12,7 +12,7 @@ class Migration(DataMigration):
         # Use orm.ModelName to refer to models in this application,
         # and orm['appname.ModelName'] for models in other applications.
         for u in orm.User.objects.filter(username__contains='@'):
-            u.username = u.username.replace('@', '')
+            u.username = u.username.split('@')[0]
             u.save()
 
     def backwards(self, orm):
--
libgit2 0.21.2