diff --git a/configs/at91sam9g20ek_2mmc_defconfig b/configs/at91sam9g20ek_2mmc_defconfig
index 1248aa3..59588bf 100644
--- a/configs/at91sam9g20ek_2mmc_defconfig
+++ b/configs/at91sam9g20ek_2mmc_defconfig
@@ -8,6 +8,7 @@
 CONFIG_NR_DRAM_BANKS=1
 CONFIG_ENV_SIZE=0x1000
 CONFIG_ENV_OFFSET=0x2000
+CONFIG_SYS_MALLOC_LEN=0x23000
 CONFIG_DM_GPIO=y
 CONFIG_DEFAULT_DEVICE_TREE="at91sam9g20ek_2mmc"
 CONFIG_DEBUG_UART_BOARD_INIT=y