diff --git a/blink1/blink1.py b/blink1/blink1.py
index 54e3b9f..59a152d 100644
--- a/blink1/blink1.py
+++ b/blink1/blink1.py
@@ -81,6 +81,7 @@ def __init__(self, serial_number=None, gamma=None, white_point=None):
         self.dev = self.find(serial_number)
 
     def close(self):
+        self.dev.close()
         self.dev = None
 
     @staticmethod