diff --git a/plat/arm/board/fvp/include/fvp_critical_data.h b/plat/arm/board/fvp/include/fvp_critical_data.h
index 3010d21..04bd5b2 100644
--- a/plat/arm/board/fvp/include/fvp_critical_data.h
+++ b/plat/arm/board/fvp/include/fvp_critical_data.h
@@ -1,8 +1,10 @@
 /*
- * Copyright (c) 2021, Arm Limited. All rights reserved.
+ * Copyright (c) 2021-2022, Arm Limited. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
+#ifndef FVP_CRITICAL_DATA_H
+#define FVP_CRITICAL_DATA_H
 
 #include <common/nv_cntr_ids.h>
 #include <lib/utils_def.h>
@@ -17,3 +19,5 @@
 	/* platform NV counters */
 	unsigned int nv_ctr[MAX_NV_CTR_IDS];
 };
+
+#endif /* FVP_CRITICAL_DATA_H */