diff --git a/util/flash_ec b/util/flash_ec
index e2f7344ef0..dc1bf18541 100755
--- a/util/flash_ec
+++ b/util/flash_ec
@@ -53,6 +53,7 @@ BOARDS_LM4=(
 BOARDS_STM32=(
 	big
 	blaze
+	chell_pd
 	discovery
 	glados_pd
 	honeybuns
@@ -301,8 +302,8 @@ function ec_uart() {
 
 # Servo variables management
 case "${BOARD}" in
-	glados_pd|oak_pd|samus_pd ) MCU="usbpd" ;;
-	kunimitsu_pd|lars_pd|strago_pd ) MCU="usbpd" ;;
+	oak_pd|samus_pd|strago_pd ) MCU="usbpd" ;;
+	chell_pd|glados_pd|kunimitsu_pd|lars_pd ) MCU="usbpd" ;;
 	dingdong|hoho|twinkie ) DUT_CONTROL_CMD="true" ; MCU="ec" ;;
 	*) MCU="ec" ;;
 esac