diff --git a/configs/db-88f6820-amc_defconfig b/configs/db-88f6820-amc_defconfig
index 3e1b404..f5d3522 100644
--- a/configs/db-88f6820-amc_defconfig
+++ b/configs/db-88f6820-amc_defconfig
@@ -3,6 +3,7 @@
 CONFIG_SYS_TEXT_BASE=0x00800000
 CONFIG_SPL_LIBCOMMON_SUPPORT=y
 CONFIG_SPL_LIBGENERIC_SUPPORT=y
+CONFIG_SYS_MALLOC_F_LEN=0x2000
 CONFIG_TARGET_DB_88F6820_AMC=y
 CONFIG_SPL_SERIAL_SUPPORT=y
 CONFIG_SPL=y