diff --git a/configs/verdin-imx8mm_defconfig b/configs/verdin-imx8mm_defconfig
index ce567b7..e6d9f37 100644
--- a/configs/verdin-imx8mm_defconfig
+++ b/configs/verdin-imx8mm_defconfig
@@ -27,7 +27,7 @@
 CONFIG_OF_SYSTEM_SETUP=y
 # CONFIG_USE_BOOTCOMMAND is not set
 CONFIG_USE_PREBOOT=y
-CONFIG_PREBOOT="setenv fdtfile imx8mm-verdin-${variant}-${fdt_board}.dtb"
+CONFIG_PREBOOT="test -n ${fdtfile} || setenv fdtfile imx8mm-verdin-${variant}-${fdt_board}.dtb"
 CONFIG_LOG=y
 # CONFIG_DISPLAY_BOARDINFO is not set
 CONFIG_DISPLAY_BOARDINFO_LATE=y