diff --git a/plat/rockchip/common/include/plat_private.h b/plat/rockchip/common/include/plat_private.h
index f9470e5..c0ebefc 100644
--- a/plat/rockchip/common/include/plat_private.h
+++ b/plat/rockchip/common/include/plat_private.h
@@ -146,6 +146,8 @@
 
 extern const mmap_region_t plat_rk_mmap[];
 
+uint32_t rockchip_get_uart_base(void);
+
 #endif /* __ASSEMBLY__ */
 
 /******************************************************************************