diff --git a/configs/at91sam9g20ek_dataflash_cs1_defconfig b/configs/at91sam9g20ek_dataflash_cs1_defconfig
index b452a5b9..665a294 100644
--- a/configs/at91sam9g20ek_dataflash_cs1_defconfig
+++ b/configs/at91sam9g20ek_dataflash_cs1_defconfig
@@ -9,6 +9,7 @@
 CONFIG_ENV_SIZE=0x4200
 CONFIG_ENV_OFFSET=0x4200
 CONFIG_ENV_SECT_SIZE=0x210
+CONFIG_SYS_MALLOC_LEN=0x2d000
 CONFIG_DM_GPIO=y
 CONFIG_DEFAULT_DEVICE_TREE="at91sam9g20ek"
 CONFIG_DEBUG_UART_BOARD_INIT=y