diff --git a/configs/mk802_a10s_defconfig b/configs/mk802_a10s_defconfig
index 21f7a6e..1fa1f00 100644
--- a/configs/mk802_a10s_defconfig
+++ b/configs/mk802_a10s_defconfig
@@ -8,6 +8,7 @@
 CONFIG_USB1_VBUS_PIN="PB10"
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
 CONFIG_SPL_I2C=y
+CONFIG_SYS_PBSIZE=1024
 CONFIG_SYS_I2C_MVTWSI=y
 CONFIG_SYS_I2C_SLAVE=0x7f
 CONFIG_SYS_I2C_SPEED=400000