diff --git a/configs/malta64_defconfig b/configs/malta64_defconfig
index 165ec03..944d0fd 100644
--- a/configs/malta64_defconfig
+++ b/configs/malta64_defconfig
@@ -14,6 +14,7 @@
 CONFIG_MISC_INIT_R=y
 CONFIG_HUSH_PARSER=y
 CONFIG_SYS_PROMPT="malta # "
+CONFIG_SYS_CBSIZE=256
 CONFIG_SYS_PBSIZE=281
 CONFIG_CMD_IMLS=y
 CONFIG_CMD_IDE=y