diff --git a/disk_mon.py b/disk_mon.py
index bcdf00d..2ed70ba 100755
--- a/disk_mon.py
+++ b/disk_mon.py
@@ -40,7 +40,7 @@ class diskmon(object):
 
             try: self.part[2]
             except IndexError:
-                for range(4):
+                for i in range(4):
                     self.part.append("not mounted")
 
             self.mtab.close()