diff --git a/target/linux/brcm63xx/base-files/etc/diag.sh b/target/linux/brcm63xx/base-files/etc/diag.sh
index cda52ac185..d492cd553e 100755
--- a/target/linux/brcm63xx/base-files/etc/diag.sh
+++ b/target/linux/brcm63xx/base-files/etc/diag.sh
@@ -61,7 +61,7 @@ set_state() {
 		status_led_set_timer 50 50
 		;;
 	done)
-		if [ "${status_led#power}" != "$status_led" ]; then
+		if [ "${status_led/power}" != "$status_led" ]; then
 			status_led_on
 		else
 			status_led_off