diff --git a/Marlin/Configuration_adv.h b/Marlin/Configuration_adv.h
index bca056f9b0..316d7dae1a 100644
--- a/Marlin/Configuration_adv.h
+++ b/Marlin/Configuration_adv.h
@@ -279,6 +279,9 @@
 //=============================Additional Features===========================
 //===========================================================================
 
+//#define CHDK 4        //Pin for triggering CHDK to take a picture see how to use it here http://captain-slow.dk/2014/03/09/3d-printing-timelapses/
+#define CHDK_DELAY 50 //How long in ms the pin should stay HIGH before going LOW again
+
 #define SD_FINISHED_STEPPERRELEASE true  //if sd support and the file is finished: disable steppers?
 #define SD_FINISHED_RELEASECOMMAND "M84 X Y Z E" // You might want to keep the z enabled so your bed stays in place.