diff --git a/db/migrate/20210115203009_fix_typo_in_activity_attachment_type.rb b/db/migrate/20210115203009_fix_typo_in_activity_attachment_type.rb
new file mode 100644
index 00000000..259c1972
--- /dev/null
+++ b/db/migrate/20210115203009_fix_typo_in_activity_attachment_type.rb
@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+# License: AGPL-3.0-or-later WITH WTO-AP-3.0-or-later
+# Full license explanation at https://github.com/houdiniproject/houdini/blob/master/License
+
+# The attachment_type for SupporterNote activities is wrong. This code fixes that
+class FixTypoInActivityAttachmentType < ActiveRecord::Migration[6.1]
+  def up
+    Activity.connection.execute("UPDATE activities SET attachment_type = 'SupporterNote' WHERE (kind = 'SupporterNote' AND attachment_type != 'SupporterNote')")
+  end
+end
diff --git a/db/structure.sql b/db/structure.sql
index 57740003..f294819d 100644
--- a/db/structure.sql
+++ b/db/structure.sql
@@ -4157,6 +4157,7 @@ INSERT INTO "schema_migrations" (version) VALUES
 ('20210105192022'),
 ('20210107210143'),
 ('20210111220133'),
-('20210114213034');
+('20210114213034'),
+('20210115203009');