diff --git a/configs/ap143_defconfig b/configs/ap143_defconfig
index 061627f..b6ab065 100644
--- a/configs/ap143_defconfig
+++ b/configs/ap143_defconfig
@@ -23,6 +23,7 @@
 CONFIG_DISPLAY_CPUINFO=y
 CONFIG_BOARD_EARLY_INIT_F=y
 CONFIG_SYS_PROMPT="ap143 # "
+CONFIG_SYS_CBSIZE=256
 CONFIG_SYS_PBSIZE=281
 # CONFIG_CMD_BDI is not set
 # CONFIG_CMD_CONSOLE is not set