diff --git a/mk/PX4/ROMFS/init.d/rc.APM b/mk/PX4/ROMFS/init.d/rc.APM
index 75e28e601d..63f9fdd1c4 100755
--- a/mk/PX4/ROMFS/init.d/rc.APM
+++ b/mk/PX4/ROMFS/init.d/rc.APM
@@ -3,9 +3,6 @@
 # APM startup script for NuttX on PX4
 
 # To disable APM startup add a /fs/microsd/APM/nostart file
-# To enable mkblctrl startup add a /fs/microsd/APM/mkblctrl file
-# To enable mkblctrl_+ startup add a /fs/microsd/APM/mkblctrl_+ file
-# To enable mkblctrl_x startup add a /fs/microsd/APM/mkblctrl_x file
 
 # check for an old file called APM, caused by 
 # a bug in an earlier firmware release
@@ -60,28 +57,6 @@ else
     sh /etc/init.d/rc.error
 fi
 
-# start mkblctrl driver if configured
-if [ -f /fs/microsd/APM/mkblctrl ]
-then
-    echo "Setting up mkblctrl driver"
-    echo "Setting up mkblctrl driver" >> $logfile
-    mkblctrl -d /dev/pwm_output
-fi
-
-if [ -f /fs/microsd/APM/mkblctrl_+ ]
-then
-    echo "Setting up mkblctrl driver +"
-    echo "Setting up mkblctrl driver +" >> $logfile
-    mkblctrl -mkmode + -d /dev/pwm_output
-fi
-
-if [ -f /fs/microsd/APM/mkblctrl_x ]
-then
-    echo "Setting up mkblctrl driver x"
-    echo "Setting up mkblctrl driver x" >> $logfile
-    mkblctrl -mkmode x -d /dev/pwm_output
-fi
-
 echo Starting ArduPilot
 if ArduPilot start
 then