diff --git a/kernel/sql/database.go b/kernel/sql/database.go
index cb5336d81..e5620aac3 100644
--- a/kernel/sql/database.go
+++ b/kernel/sql/database.go
@@ -147,6 +147,11 @@ func initDBTables() {
 		logging.LogFatalf(logging.ExitCodeUnavailableDatabase, "create index [idx_blocks_root_id] failed: %s", err)
 	}
 
+	_, err = db.Exec("CREATE INDEX idx_blocks_root_id_id_hash ON blocks(root_id, id, hash)")
+	if err != nil {
+		logging.LogFatalf(logging.ExitCodeUnavailableDatabase, "create index [idx_blocks_root_id_id_hash] failed: %s", err)
+	}
+
 	_, err = db.Exec("DROP TABLE IF EXISTS blocks_fts")
 	if err != nil {
 		logging.LogFatalf(logging.ExitCodeUnavailableDatabase, "drop table [blocks_fts] failed: %s", err)