diff --git a/plat/imx/imx8m/imx8mn/platform.mk b/plat/imx/imx8m/imx8mn/platform.mk
index 4651610..a6b43f2 100644
--- a/plat/imx/imx8m/imx8mn/platform.mk
+++ b/plat/imx/imx8m/imx8mn/platform.mk
@@ -65,6 +65,9 @@
 $(eval $(call add_define,BL32_SIZE))
 
 IMX_BOOT_UART_BASE	?=	0x30890000
+ifeq (${IMX_BOOT_UART_BASE},auto)
+    override IMX_BOOT_UART_BASE	:=	0
+endif
 $(eval $(call add_define,IMX_BOOT_UART_BASE))
 
 EL3_EXCEPTION_HANDLING := $(SDEI_SUPPORT)