diff --git a/target/linux/rockchip/rk35xx/base-files/lib/upgrade/ota.sh b/target/linux/rockchip/rk35xx/base-files/lib/upgrade/ota.sh
index abea659ee3..911368e765 100644
--- a/target/linux/rockchip/rk35xx/base-files/lib/upgrade/ota.sh
+++ b/target/linux/rockchip/rk35xx/base-files/lib/upgrade/ota.sh
@@ -6,7 +6,7 @@ export_ota_url() {
 	case "$board" in
 	hlink,h28k|\
 	radxa,e20c|\
- 	radxa,e52c|\
+	radxa,e52c|\
 	easepi,ars4|\
 	lyt,t68m)
 		export -n OTA_URL_BASE="https://fw0.koolcenter.com/iStoreOS/${board##*,}"