diff --git a/configs/khadas-edge-captain-rk3399_defconfig b/configs/khadas-edge-captain-rk3399_defconfig
index cddf522..44ec22f 100644
--- a/configs/khadas-edge-captain-rk3399_defconfig
+++ b/configs/khadas-edge-captain-rk3399_defconfig
@@ -19,6 +19,7 @@
 CONFIG_SPL_STACK_R_MALLOC_SIMPLE_LEN=0x10000
 CONFIG_TPL=y
 CONFIG_SYS_PROMPT="kedge# "
+CONFIG_SYS_PBSIZE=1048
 CONFIG_CMD_BOOTZ=y
 CONFIG_CMD_GPT=y
 CONFIG_CMD_MMC=y