diff --git a/configs/grpeach_defconfig b/configs/grpeach_defconfig
index d37b48d..fb5b90f 100644
--- a/configs/grpeach_defconfig
+++ b/configs/grpeach_defconfig
@@ -3,6 +3,7 @@
 CONFIG_ARCH_RMOBILE=y
 CONFIG_SYS_TEXT_BASE=0x18000000
 CONFIG_SYS_MALLOC_LEN=0x100000
+CONFIG_SYS_MALLOC_F_LEN=0x400
 CONFIG_NR_DRAM_BANKS=1
 CONFIG_ENV_SIZE=0x10000
 CONFIG_ENV_OFFSET=0x80000