diff --git a/target/linux/ath79/mikrotik/base-files/lib/upgrade/platform.sh b/target/linux/ath79/mikrotik/base-files/lib/upgrade/platform.sh
index 1ce42f7b79..629e7fd9b8 100644
--- a/target/linux/ath79/mikrotik/base-files/lib/upgrade/platform.sh
+++ b/target/linux/ath79/mikrotik/base-files/lib/upgrade/platform.sh
@@ -26,6 +26,8 @@ platform_check_image_mikrotik_nor() {
 }
 
 platform_check_image() {
+	local board=$(board_name)
+
 	case "$board" in
 	mikrotik,routerboard-2011uias-2hnd|\
 	mikrotik,routerboard-493g|\