diff --git a/buildroot-external/board/ova/barebox.config b/buildroot-external/board/ova/barebox.config
index 755c03b38..f11b5acd4 100644
--- a/buildroot-external/board/ova/barebox.config
+++ b/buildroot-external/board/ova/barebox.config
@@ -1,6 +1,8 @@
 # CONFIG_LOCALVERSION_AUTO is not set
 CONFIG_MMU=y
 CONFIG_PROMPT="hassio-os:"
+CONFIG_MALLOC_SIZE=0x0
+CONFIG_MALLOC_TLSF=y
 CONFIG_BOOTM_SHOW_TYPE=y
 CONFIG_BOOTM_OFTREE=y
 CONFIG_DEFAULT_ENVIRONMENT_GENERIC_NEW=y