diff --git a/plat/rockchip/px30/include/platform_def.h b/plat/rockchip/px30/include/platform_def.h
index 2f4f672..a11f84f 100644
--- a/plat/rockchip/px30/include/platform_def.h
+++ b/plat/rockchip/px30/include/platform_def.h
@@ -39,10 +39,10 @@
 #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_CLUSTER1_CORE_COUNT	0
+#define PLATFORM_SYSTEM_COUNT		U(1)
+#define PLATFORM_CLUSTER_COUNT		U(1)
+#define PLATFORM_CLUSTER0_CORE_COUNT	U(4)
+#define PLATFORM_CLUSTER1_CORE_COUNT	U(0)
 #define PLATFORM_CORE_COUNT		(PLATFORM_CLUSTER1_CORE_COUNT +	\
 					 PLATFORM_CLUSTER0_CORE_COUNT)