diff --git a/buildroot-external/board/rpi3/barebox.config b/buildroot-external/board/rpi3/barebox.config
index 3f5598bbe..490fab285 100644
--- a/buildroot-external/board/rpi3/barebox.config
+++ b/buildroot-external/board/rpi3/barebox.config
@@ -5,6 +5,7 @@ CONFIG_AEABI=y
 CONFIG_ARM_OPTIMZED_STRING_FUNCTIONS=y
 CONFIG_ARM_UNWIND=y
 CONFIG_MMU=y
+CONFIG_MALLOC_SIZE=0x0
 CONFIG_MALLOC_TLSF=y
 CONFIG_KALLSYMS=y
 CONFIG_PROMPT="HassOS-boot:"