diff --git a/config/sources/families/include/rockchip64_common.inc b/config/sources/families/include/rockchip64_common.inc
index fd8dd53fac..38dc8ed6e2 100644
--- a/config/sources/families/include/rockchip64_common.inc
+++ b/config/sources/families/include/rockchip64_common.inc
@@ -332,7 +332,7 @@ write_uboot_platform_mtd() {
 
 	CHOICE=$(dialog --no-collapse \
   		--title "armbian-install" \
-  		--backtitle $backtitle \
+  		--backtitle "$backtitle" \
   		--radiolist "Choose SPI image:" 0 56 4 \
   		"${MENU_ITEMS[@]}" \
   		3>&1 1>&2 2>&3)