diff --git a/main.go b/main.go
index 9264ace..3227b67 100644
--- a/main.go
+++ b/main.go
@@ -149,7 +149,8 @@ func init() {
 	dsn = flag.String("dsn", "", "Database connection string")
 	sockpath = flag.String("sock", "", "Unix socket path")
 	flag.Parse()
-	db, err := sql.Open("mysql", *dsn)
+	var err error
+	db, err = sql.Open("mysql", *dsn)
 	if err != nil {
 		log.Fatalf("sql.Open: %s", err.Error())
 	}