diff --git a/src/exchangedb/exchange-0001.sql b/src/exchangedb/exchange-0001.sql
index 0cef7d0db..477a9b0dc 100644
--- a/src/exchangedb/exchange-0001.sql
+++ b/src/exchangedb/exchange-0001.sql
@@ -196,7 +196,7 @@ CREATE INDEX IF NOT EXISTS reserves_close_by_reserve_pub_index
 
 CREATE TABLE IF NOT EXISTS reserves_out
   (reserve_out_serial_id BIGINT GENERATED BY DEFAULT AS IDENTITY -- UNIQUE
-  ,h_blind_ev BYTEA CHECK (LENGTH(h_blind_ev)=64) -- UNIQUE
+  ,h_blind_ev BYTEA CHECK (LENGTH(h_blind_ev)=64) UNIQUE
   ,denominations_serial INT8 NOT NULL REFERENCES denominations (denominations_serial)
   ,denom_sig BYTEA NOT NULL
   ,reserve_uuid INT8 NOT NULL -- REFERENCES reserves (reserve_uuid) ON DELETE CASCADE