diff --git a/sql/marketdb.sql b/sql/marketdb.sql
index a837e73a..db310399 100644
--- a/sql/marketdb.sql
+++ b/sql/marketdb.sql
@@ -548,7 +548,7 @@ CREATE TABLE `t_blockchain_event` (
   KEY `instance_name` (`instance_name`),
   KEY `event_name` (`event_name`),
   KEY `txhash` (`txhash`),
-  KEY `txhash_log_index` (`txhash`, `'log_index'),
+  KEY `txhash_log_index` (`txhash`, `log_index`),
   KEY `block_number` (`block_number`)
 ) ENGINE=InnoDB AUTO_INCREMENT=10001 DEFAULT CHARSET=utf8 COLLATE=utf8_bin;
 /*!40101 SET character_set_client = @saved_cs_client */;