diff --git a/plot.py b/plot.py
index 246eb35..7b7686a 100644
--- a/plot.py
+++ b/plot.py
@@ -1,3 +1,6 @@
+#!/usr/bin/python
+# vim: set fileencoding=utf-8 :
+
 import numpy as np
 import matplotlib.pyplot as plt
 import pandas as pd