diff --git a/arch/mips/configs/ath79_defconfig b/arch/mips/configs/ath79_defconfig
index 8d7d5a1..3f33a72 100644
--- a/arch/mips/configs/ath79_defconfig
+++ b/arch/mips/configs/ath79_defconfig
@@ -7,6 +7,7 @@
 CONFIG_IMAGE_COMPRESSION_XZKERN=y
 CONFIG_MMU=y
 CONFIG_TEXT_BASE=0x81000000
+CONFIG_MALLOC_SIZE=0x800000
 CONFIG_MALLOC_TLSF=y
 CONFIG_HUSH_FANCY_PROMPT=y
 CONFIG_CMDLINE_EDITING=y