diff --git a/orm/db_alias.go b/orm/db_alias.go
index 816441a6..13b34aa8 100644
--- a/orm/db_alias.go
+++ b/orm/db_alias.go
@@ -140,7 +140,7 @@ func detectTZ(al *alias) {
 		if engine != "" {
 			al.Engine = engine
 		} else {
-			engine = "INNODB"
+			al.Engine = "INNODB"
 		}
 
 	case DR_Sqlite: