diff --git a/synapse/storage/schema/delta/33/refreshtoken_device.sql b/synapse/storage/schema/delta/33/refreshtoken_device.sql
index b21da00dd..290bd6da8 100644
--- a/synapse/storage/schema/delta/33/refreshtoken_device.sql
+++ b/synapse/storage/schema/delta/33/refreshtoken_device.sql
@@ -13,4 +13,4 @@
  * limitations under the License.
  */
 
-ALTER TABLE refresh_tokens ADD COLUMN device_id BIGINT;
+ALTER TABLE refresh_tokens ADD COLUMN device_id TEXT;