diff --git a/libraries/AP_HAL_ChibiOS/hwdef/CubeYellow/defaults.parm b/libraries/AP_HAL_ChibiOS/hwdef/CubeYellow/defaults.parm
index 1c6554e50c..bdb241564c 100644
--- a/libraries/AP_HAL_ChibiOS/hwdef/CubeYellow/defaults.parm
+++ b/libraries/AP_HAL_ChibiOS/hwdef/CubeYellow/defaults.parm
@@ -9,3 +9,5 @@ BATT2_VOLT_MULT 12.02
 # lower heater gains
 BRD_HEAT_I 0.07
 BRD_HEAT_P 50
+EK2_PRIMARY 1
+EK3_PRIMARY 1