diff --git a/screenless/bureau/photography/photography.py b/screenless/bureau/photography/photography.py
index 649a41c..84c29db 100644
--- a/screenless/bureau/photography/photography.py
+++ b/screenless/bureau/photography/photography.py
@@ -22,8 +22,8 @@ class Photography(Bureau):
         
         # set up the gpios for lamp & knobs
         gpio.init()
-        gpio.pullup(doc_light_pin, 0)  # reset pullup state
-        gpio.pullup(doc_light_pin, gpio.PULLDOWN)
+        gpio.pullup(self.doc_light_pin, 0)  # reset pullup state
+        gpio.pullup(self.doc_light_pin, gpio.PULLDOWN)
 
 
     def _doc_light_on(self):