diff --git a/include/lib/cpus/aarch64/aem_generic.h b/include/lib/cpus/aarch64/aem_generic.h
index 1edef84..6bb30a2 100644
--- a/include/lib/cpus/aarch64/aem_generic.h
+++ b/include/lib/cpus/aarch64/aem_generic.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2014-2019, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -7,10 +7,12 @@
 #ifndef AEM_GENERIC_H
 #define AEM_GENERIC_H
 
+#include <lib/utils_def.h>
+
 /* BASE AEM midr for revision 0 */
-#define BASE_AEM_MIDR 0x410FD0F0
+#define BASE_AEM_MIDR		U(0x410FD0F0)
 
 /* Foundation AEM midr for revision 0 */
-#define FOUNDATION_AEM_MIDR  0x410FD000
+#define FOUNDATION_AEM_MIDR	U(0x410FD000)
 
 #endif /* AEM_GENERIC_H */