diff --git a/plat/allwinner/common/include/sunxi_private.h b/plat/allwinner/common/include/sunxi_private.h
index b68d23f..6cf4670 100644
--- a/plat/allwinner/common/include/sunxi_private.h
+++ b/plat/allwinner/common/include/sunxi_private.h
@@ -41,4 +41,12 @@
 int sunxi_init_platform_r_twi(uint16_t socid, bool use_rsb);
 void sunxi_execute_arisc_code(uint32_t *code, size_t size, uint16_t param);
 
+#ifdef SUNXI_BL31_IN_DRAM
+void sunxi_prepare_dtb(void *fdt);
+#else
+static inline void sunxi_prepare_dtb(void *fdt)
+{
+}
+#endif
+
 #endif /* SUNXI_PRIVATE_H */