diff --git a/configs/comtrend_ct5361_ram_defconfig b/configs/comtrend_ct5361_ram_defconfig
index b3c4109..0e6e823 100644
--- a/configs/comtrend_ct5361_ram_defconfig
+++ b/configs/comtrend_ct5361_ram_defconfig
@@ -20,6 +20,7 @@
 CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PROMPT="CT-5361 # "
 CONFIG_SYS_MAXARGS=24
+CONFIG_SYS_CBSIZE=512
 CONFIG_SYS_PBSIZE=539
 CONFIG_CMD_CPU=y
 CONFIG_CMD_LICENSE=y