diff --git a/plat/rockchip/rk3288/include/platform_def.h b/plat/rockchip/rk3288/include/platform_def.h
index e24aeff..85ec3fb 100644
--- a/plat/rockchip/rk3288/include/platform_def.h
+++ b/plat/rockchip/rk3288/include/platform_def.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2014-2019, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -36,11 +36,11 @@
 #define FIRMWARE_WELCOME_STR		"Booting Trusted Firmware\n"
 
 #define PLATFORM_MAX_AFFLVL		MPIDR_AFFLVL2
-#define PLATFORM_SYSTEM_COUNT		1
-#define PLATFORM_CLUSTER_COUNT		1
-#define PLATFORM_CLUSTER0_CORE_COUNT	4
+#define PLATFORM_SYSTEM_COUNT		U(1)
+#define PLATFORM_CLUSTER_COUNT		U(1)
+#define PLATFORM_CLUSTER0_CORE_COUNT	U(4)
 #define PLATFORM_CORE_COUNT		(PLATFORM_CLUSTER0_CORE_COUNT)
-#define PLATFORM_MAX_CPUS_PER_CLUSTER	4
+#define PLATFORM_MAX_CPUS_PER_CLUSTER	U(4)
 #define PLATFORM_NUM_AFFS		(PLATFORM_SYSTEM_COUNT +	\
 					 PLATFORM_CLUSTER_COUNT +	\
 					 PLATFORM_CORE_COUNT)