diff --git a/include/configs/sunxi-common.h b/include/configs/sunxi-common.h
index 3855c56..6236e12 100644
--- a/include/configs/sunxi-common.h
+++ b/include/configs/sunxi-common.h
@@ -147,6 +147,16 @@
 #endif
 
 #if defined(CONFIG_ENV_IS_IN_MMC)
+
+#ifdef CONFIG_ARM64
+/*
+ * This is actually (CONFIG_ENV_OFFSET -
+ * (CONFIG_SYS_MMCSD_RAW_MODE_U_BOOT_SECTOR * 512)), but the value will be used
+ * directly in a makefile, without the preprocessor expansion.
+ */
+#define CONFIG_BOARD_SIZE_LIMIT		0x7e000
+#endif
+
 #if CONFIG_MMC_SUNXI_SLOT_EXTRA != -1
 /* If we have two devices (most likely eMMC + MMC), favour the eMMC */
 #define CONFIG_SYS_MMC_ENV_DEV		1