diff --git a/plat/arm/board/rdn1edge/rdn1edge_security.c b/plat/arm/board/rdn1edge/rdn1edge_security.c
index ffa8935..4943532 100644
--- a/plat/arm/board/rdn1edge/rdn1edge_security.c
+++ b/plat/arm/board/rdn1edge/rdn1edge_security.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, ARM Limited. All rights reserved.
+ * Copyright (c) 2019-2021, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -7,7 +7,7 @@
 #include <platform_def.h>
 
 #include <common/debug.h>
-#include <drivers/arm/tzc_dmc620.h>
+#include <sgi_dmc620_tzc_regions.h>
 
 uintptr_t rdn1edge_dmc_base[] = {
 	RDN1EDGE_DMC620_BASE0,
@@ -20,11 +20,7 @@
 };
 
 static const tzc_dmc620_acc_addr_data_t rdn1edge_acc_addr_data[] = {
-	{
-		.region_base = ARM_AP_TZC_DRAM1_BASE,
-		.region_top = ARM_AP_TZC_DRAM1_BASE + ARM_TZC_DRAM1_SIZE - 1,
-		.sec_attr = TZC_DMC620_REGION_S_RDWR
-	}
+	CSS_SGI_DMC620_TZC_REGIONS_DEF
 };
 
 static const tzc_dmc620_config_data_t rdn1edge_plat_config_data = {