diff --git a/cmd/mautrix-telegram/legacymigrate.sql b/cmd/mautrix-telegram/legacymigrate.sql
index d09b94e1..b4a85ed2 100644
--- a/cmd/mautrix-telegram/legacymigrate.sql
+++ b/cmd/mautrix-telegram/legacymigrate.sql
@@ -249,28 +249,13 @@ ALTER TABLE mx_room_state ALTER COLUMN members_fetched SET DEFAULT false;
 ALTER TABLE mx_room_state ALTER COLUMN members_fetched SET NOT NULL;
 -- end only postgres
 
-CREATE TABLE new_mx_user_profile (
-    room_id       TEXT,
-    user_id       TEXT,
-    membership    membership NOT NULL,
-    displayname   TEXT       NOT NULL DEFAULT '',
-    avatar_url    TEXT       NOT NULL DEFAULT '',
-
-    name_skeleton bytea,
-
-    PRIMARY KEY (room_id, user_id)
-);
-
-INSERT INTO new_mx_user_profile
-SELECT room_id, user_id, membership, COALESCE(displayname, ''), COALESCE(avatar_url, '')
-FROM mx_user_profile;
-
-DROP TABLE mx_user_profile;
-ALTER TABLE new_mx_user_profile RENAME TO mx_user_profile;
-
+ALTER TABLE mx_user_profile ADD COLUMN name_skeleton bytea;
 CREATE INDEX mx_user_profile_membership_idx ON mx_user_profile (room_id, membership);
 CREATE INDEX mx_user_profile_name_skeleton_idx ON mx_user_profile (room_id, name_skeleton);
 
+UPDATE mx_user_profile SET displayname='' WHERE displayname IS NULL;
+UPDATE mx_user_profile SET avatar_url='' WHERE avatar_url IS NULL;
+
 CREATE TABLE mx_registrations (
     user_id TEXT PRIMARY KEY
 );