diff --git a/src/soc/mediatek/mt8186/Kconfig b/src/soc/mediatek/mt8186/Kconfig
index ce915e26c3..5393baadf0 100644
--- a/src/soc/mediatek/mt8186/Kconfig
+++ b/src/soc/mediatek/mt8186/Kconfig
@@ -5,6 +5,7 @@ config SOC_MEDIATEK_MT8186
 	select ARCH_VERSTAGE_ARMV8_64
 	select ARCH_ROMSTAGE_ARMV8_64
 	select ARCH_RAMSTAGE_ARMV8_64
+	select ARM64_USE_ARM_TRUSTED_FIRMWARE
 	select HAVE_UART_SPECIAL
 	select SOC_MEDIATEK_COMMON
 
diff --git a/src/soc/mediatek/mt8186/Makefile.inc b/src/soc/mediatek/mt8186/Makefile.inc
index fbde650186..7a2f997153 100644
--- a/src/soc/mediatek/mt8186/Makefile.inc
+++ b/src/soc/mediatek/mt8186/Makefile.inc
@@ -58,6 +58,8 @@ ramstage-y += ../common/wdt.c wdt.c
 ramstage-y += ../common/pmic_wrap.c pmic_wrap.c mt6366.c
 ramstage-y += ../common/rtc.c ../common/rtc_osc_init.c rtc.c
 
+BL31_MAKEARGS += PLAT=mt8186
+
 CPPFLAGS_common += -Isrc/soc/mediatek/mt8186/include
 CPPFLAGS_common += -Isrc/soc/mediatek/common/include