diff --git a/syncapi/consumers/multiroomdata.go b/syncapi/consumers/multiroomdata.go
index d58f2b185..a04f8affb 100644
--- a/syncapi/consumers/multiroomdata.go
+++ b/syncapi/consumers/multiroomdata.go
@@ -95,7 +95,7 @@ func (s *OutputMultiRoomDataConsumer) onMessage(ctx context.Context, msgs []*nat
 
 	rooms, err := s.db.SelectMultiRoomVisibilityRooms(ctx, mrd.SelectMultiRoomVisibilityRoomsParams{
 		UserID:   userID,
-		ExpireTs: time.Now().Unix(),
+		ExpireTs: time.Now().UnixMilli(),
 	})
 	if err != nil {
 		sentry.CaptureException(err)
diff --git a/syncapi/storage/mrd/types.go b/syncapi/storage/mrd/types.go
index a1bf76f81..927d52c0d 100644
--- a/syncapi/storage/mrd/types.go
+++ b/syncapi/storage/mrd/types.go
@@ -1,6 +1,6 @@
 package mrd
 
 type StateEvent struct {
-	Hidden   bool `json:"hidden"`
-	ExpireTs int  `json:"expire_ts"`
+	Hidden   bool  `json:"hidden"`
+	ExpireTs int64 `json:"expire_ts"`
 }
diff --git a/syncapi/storage/shared/storage_consumer.go b/syncapi/storage/shared/storage_consumer.go
index d5a1c564f..4e47937c1 100644
--- a/syncapi/storage/shared/storage_consumer.go
+++ b/syncapi/storage/shared/storage_consumer.go
@@ -655,7 +655,7 @@ func (d *Database) UpdateMultiRoomVisibility(ctx context.Context, event *gomatri
 			UserID:   event.Sender(),
 			Type:     event.Type(),
 			RoomID:   event.RoomID(),
-			ExpireTs: int64(mrdEv.ExpireTs),
+			ExpireTs: mrdEv.ExpireTs,
 		})
 		if err != nil {
 			return fmt.Errorf("insert multiroom visibility failed: %w", err)
diff --git a/syncapi/syncapi.go b/syncapi/syncapi.go
index c6b1f4190..6e3d306f1 100644
--- a/syncapi/syncapi.go
+++ b/syncapi/syncapi.go
@@ -56,7 +56,7 @@ func AddPublicRoutes(
 	go func() {
 		var affected int64
 		for {
-			affected, err = mrq.DeleteMultiRoomVisibilityByExpireTS(context.Background(), time.Now().Unix())
+			affected, err = mrq.DeleteMultiRoomVisibilityByExpireTS(context.Background(), time.Now().UnixMilli())
 			if err != nil {
 				logrus.WithError(err).Error("failed to expire multiroom visibility")
 			}
diff --git a/syncapi/types/multiroom_test.go b/syncapi/types/multiroom_test.go
index d2a49d480..265da23a9 100644
--- a/syncapi/types/multiroom_test.go
+++ b/syncapi/types/multiroom_test.go
@@ -14,8 +14,8 @@ func TestMarshallMultiRoom(t *testing.T) {
 			"@3:example.com": map[string]MultiRoomData{
 				"location": {
 					Content:        MultiRoomContent(`{"foo":"bar"}`),
-					OriginServerTs: 123,
+					OriginServerTs: 1234567890000,
 				}}})
 	is.NoErr(err)
-	is.Equal(m, []byte(`{"@3:example.com":{"location":{"content":{"foo":"bar"},"origin_server_ts":123}}}`))
+	is.Equal(m, []byte(`{"@3:example.com":{"location":{"content":{"foo":"bar"},"origin_server_ts":1234567890000}}}`))
 }