diff --git a/configs/CSQ_CS908_defconfig b/configs/CSQ_CS908_defconfig
index 1cd39d4..f79bc78 100644
--- a/configs/CSQ_CS908_defconfig
+++ b/configs/CSQ_CS908_defconfig
@@ -7,6 +7,7 @@
 CONFIG_USB1_VBUS_PIN=""
 CONFIG_USB2_VBUS_PIN=""
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
+CONFIG_SYS_PBSIZE=1024
 CONFIG_PHY_REALTEK=y
 CONFIG_ETH_DESIGNWARE=y
 CONFIG_MII=y