diff --git a/configs/rpi_4_defconfig b/configs/rpi_4_defconfig
index 2ce1b6b..0759805 100644
--- a/configs/rpi_4_defconfig
+++ b/configs/rpi_4_defconfig
@@ -7,7 +7,7 @@
 CONFIG_NR_DRAM_BANKS=2
 CONFIG_DISTRO_DEFAULTS=y
 CONFIG_OF_BOARD_SETUP=y
-# CONFIG_ARCH_FIXUP_FDT_MEMORY is not set
+CONFIG_ARCH_FIXUP_FDT_MEMORY=y
 CONFIG_MISC_INIT_R=y
 # CONFIG_DISPLAY_CPUINFO is not set
 # CONFIG_DISPLAY_BOARDINFO is not set