diff --git a/ROMFS/px4fmu_common/init.d/10016_3dr_iris b/ROMFS/px4fmu_common/init.d/10016_3dr_iris
index f3f11fdd3c..3bb4346d96 100644
--- a/ROMFS/px4fmu_common/init.d/10016_3dr_iris
+++ b/ROMFS/px4fmu_common/init.d/10016_3dr_iris
@@ -29,6 +29,6 @@ then
 	param set BAT_A_PER_V 15.39103
 fi
 
-set MIXER dc
+set MIXER quad_dc
 
 set PWM_OUT 1234
diff --git a/ROMFS/px4fmu_common/init.d/rcS b/ROMFS/px4fmu_common/init.d/rcS
index 836fabc370..a76d4a57e2 100644
--- a/ROMFS/px4fmu_common/init.d/rcS
+++ b/ROMFS/px4fmu_common/init.d/rcS
@@ -10,7 +10,8 @@
 # USART2		/dev/ttyS1		TELEM1 (flow control)
 # USART3		/dev/ttyS2		TELEM2 (flow control)
 # UART4
-# UART
+# UART7							CONSOLE
+# UART8							SERIAL4
 #
 #
 # UART mapping on FMUv5: