diff --git a/sql.go b/sql.go
index 611265e..fbc2d16 100644
--- a/sql.go
+++ b/sql.go
@@ -28,7 +28,7 @@ func initDB() {
 		err = rows.Scan(&name)
 		failOnError(err, "initDB : show tables listing")
 
-		_, err = tx.Exec("drop table " + name)
+		_, err = db.Exec("drop table " + name)
 		failOnError(err, "initDB : drop table "+name)
 	}
 	err = rows.Err()