diff --git a/payloads/external/tianocore/Makefile b/payloads/external/tianocore/Makefile
index 0c5fdb3..a4ccfc7 100644
--- a/payloads/external/tianocore/Makefile
+++ b/payloads/external/tianocore/Makefile
@@ -9,7 +9,7 @@
 project_git_branch=uefipayload_202107
 upstream_git_repo=https://github.com/tianocore/edk2
 
-build_flavor=-D BOOTLOADER=COREBOOT -D PCIE_BASE=$(CONFIG_MMCONF_BASE_ADDRESS) -DPS2_KEYBOARD_ENABLE
+build_flavor=-D BOOTLOADER=COREBOOT -D PCIE_BASE=$(CONFIG_ECAM_MMCONF_BASE_ADDRESS) -DPS2_KEYBOARD_ENABLE
 
 ifeq ($(CONFIG_TIANOCORE_COREBOOTPAYLOAD),y)
 project_git_branch=coreboot_fb