diff --git a/plat/socionext/synquacer/include/platform_def.h b/plat/socionext/synquacer/include/platform_def.h
index 7e54b39..7158bfa 100644
--- a/plat/socionext/synquacer/include/platform_def.h
+++ b/plat/socionext/synquacer/include/platform_def.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2018-2019, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -11,8 +11,8 @@
 #include <plat/common/common_def.h>
 
 /* CPU topology */
-#define PLAT_MAX_CORES_PER_CLUSTER	2
-#define PLAT_CLUSTER_COUNT		12
+#define PLAT_MAX_CORES_PER_CLUSTER	U(2)
+#define PLAT_CLUSTER_COUNT		U(12)
 #define PLATFORM_CORE_COUNT		(PLAT_CLUSTER_COUNT *	\
 					 PLAT_MAX_CORES_PER_CLUSTER)
 
diff --git a/plat/socionext/uniphier/include/platform_def.h b/plat/socionext/uniphier/include/platform_def.h
index d4db3f5..f5e7611 100644
--- a/plat/socionext/uniphier/include/platform_def.h
+++ b/plat/socionext/uniphier/include/platform_def.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2018, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -17,8 +17,8 @@
 #define CACHE_WRITEBACK_GRANULE		(1 << (CACHE_WRITEBACK_SHIFT))
 
 /* topology */
-#define UNIPHIER_MAX_CPUS_PER_CLUSTER	4
-#define UNIPHIER_CLUSTER_COUNT		2
+#define UNIPHIER_MAX_CPUS_PER_CLUSTER	U(4)
+#define UNIPHIER_CLUSTER_COUNT		U(2)
 
 #define PLATFORM_CORE_COUNT		\
 	((UNIPHIER_MAX_CPUS_PER_CLUSTER) * (UNIPHIER_CLUSTER_COUNT))