diff --git a/include/lib/cpus/aarch32/cortex_a9.h b/include/lib/cpus/aarch32/cortex_a9.h
index a9e86ef..1fb0a92 100644
--- a/include/lib/cpus/aarch32/cortex_a9.h
+++ b/include/lib/cpus/aarch32/cortex_a9.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2017-2019, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -7,16 +7,18 @@
 #ifndef CORTEX_A9_H
 #define CORTEX_A9_H
 
+#include <lib/utils_def.h>
+
 /*******************************************************************************
  * Cortex-A9 midr with version/revision set to 0
  ******************************************************************************/
-#define CORTEX_A9_MIDR			0x410FC090
+#define CORTEX_A9_MIDR			U(0x410FC090)
 
 /*******************************************************************************
  * CPU Auxiliary Control register specific definitions.
  ******************************************************************************/
-#define CORTEX_A9_ACTLR_SMP_BIT		(1 << 6)
-#define CORTEX_A9_ACTLR_FLZW_BIT	(1 << 3)
+#define CORTEX_A9_ACTLR_SMP_BIT		(U(1) << 6)
+#define CORTEX_A9_ACTLR_FLZW_BIT	(U(1) << 3)
 
 /*******************************************************************************
  * CPU Power Control Register