diff --git a/ROMFS/px4fmu_common/init.d/rcS b/ROMFS/px4fmu_common/init.d/rcS
index 4d337171a9..479a340fe5 100644
--- a/ROMFS/px4fmu_common/init.d/rcS
+++ b/ROMFS/px4fmu_common/init.d/rcS
@@ -515,6 +515,10 @@ then
 			then
 				set MAV_TYPE 2
 			fi
+			if [ $MIXER == tri_y_yaw- -o $MIXER == tri_y_yaw+ ]
+			then
+				set MAV_TYPE 2
+			fi
 			if [ $MIXER == hexa_x -o $MIXER == hexa_+ ]
 			then
 				set MAV_TYPE 13