diff --git a/arch/arm/configs/mx21ads_defconfig b/arch/arm/configs/mx21ads_defconfig
index 52f84e1..175c229 100644
--- a/arch/arm/configs/mx21ads_defconfig
+++ b/arch/arm/configs/mx21ads_defconfig
@@ -3,6 +3,7 @@
 CONFIG_IMX_CLKO=y
 CONFIG_ARM_OPTIMZED_STRING_FUNCTIONS=y
 CONFIG_TEXT_BASE=0xc1000000
+CONFIG_MALLOC_SIZE=0x500000
 CONFIG_LONGHELP=y
 CONFIG_CMDLINE_EDITING=y
 CONFIG_AUTO_COMPLETE=y