diff --git a/include/configs/sunxi-common.h b/include/configs/sunxi-common.h
index 786155f..ee1cb39 100644
--- a/include/configs/sunxi-common.h
+++ b/include/configs/sunxi-common.h
@@ -34,6 +34,7 @@
 
 #ifdef CONFIG_ARM64
 #define CONFIG_BUILD_TARGET "u-boot.itb"
+#define CONFIG_SYS_BOOTM_LEN		(32 << 20)
 #endif
 
 /* Serial & console */