diff --git a/ROMFS/px4fmu_common/init.d/16_3dr_iris b/ROMFS/px4fmu_common/init.d/16_3dr_iris
index b6c5fbdea4..d47ecb3932 100644
--- a/ROMFS/px4fmu_common/init.d/16_3dr_iris
+++ b/ROMFS/px4fmu_common/init.d/16_3dr_iris
@@ -53,7 +53,7 @@ else
 	mavlink start -d /dev/ttyS0
 	usleep 5000
 	fmu mode_pwm
-	param set BAT_V_SCALING 0.004593
+	param set BAT_V_SCALING 0.0098
 	set EXIT_ON_END yes
 fi