diff --git a/ds18b20.py b/ds18b20.py
index 96188e5..e67cae2 100755
--- a/ds18b20.py
+++ b/ds18b20.py
@@ -1,6 +1,5 @@
 #!/usr/bin/env python3
 
-from select import select
 import sys
 from time import sleep, time
 import globals
@@ -57,7 +56,6 @@
 
     finally:
         probe.close()
-        f.close()
 
 # Run this from the command line