diff --git a/configs/stm32mp15_defconfig b/configs/stm32mp15_defconfig
index 12b9b54..2700b5c 100644
--- a/configs/stm32mp15_defconfig
+++ b/configs/stm32mp15_defconfig
@@ -7,7 +7,7 @@
 CONFIG_ENV_SECT_SIZE=0x40000
 CONFIG_DEFAULT_DEVICE_TREE="stm32mp157c-ev1"
 CONFIG_SYS_PROMPT="STM32MP> "
-CONFIG_DDR_CACHEABLE_SIZE=0x10000000
+CONFIG_DDR_CACHEABLE_SIZE=0x8000000
 CONFIG_CMD_STM32KEY=y
 CONFIG_TYPEC_STUSB160X=y
 CONFIG_TARGET_ST_STM32MP15x=y