diff --git a/configs/boston64r2el_defconfig b/configs/boston64r2el_defconfig
index 0546f5d..681c053 100644
--- a/configs/boston64r2el_defconfig
+++ b/configs/boston64r2el_defconfig
@@ -1,6 +1,7 @@
 CONFIG_MIPS=y
 CONFIG_SYS_TEXT_BASE=0xFFFFFFFF9FC00000
 CONFIG_SYS_MALLOC_LEN=0x40000
+CONFIG_SYS_MALLOC_F_LEN=0x400
 CONFIG_ENV_SIZE=0x20000
 CONFIG_ENV_SECT_SIZE=0x20000
 CONFIG_DEFAULT_DEVICE_TREE="img,boston"