diff --git a/configs/boston64r6_defconfig b/configs/boston64r6_defconfig
index 4e5a4ac..d31b92d 100644
--- a/configs/boston64r6_defconfig
+++ b/configs/boston64r6_defconfig
@@ -20,6 +20,7 @@
 CONFIG_FIT_BEST_MATCH=y
 CONFIG_OF_STDOUT_VIA_ALIAS=y
 CONFIG_SYS_PROMPT="boston # "
+CONFIG_SYS_CBSIZE=256
 CONFIG_SYS_PBSIZE=282
 # CONFIG_CMD_ELF is not set
 CONFIG_CMD_GREPENV=y