diff --git a/plat/arm/css/common/aarch32/css_helpers.S b/plat/arm/css/common/aarch32/css_helpers.S
index 80aa24c..d47e13d 100644
--- a/plat/arm/css/common/aarch32/css_helpers.S
+++ b/plat/arm/css/common/aarch32/css_helpers.S
@@ -3,10 +3,11 @@
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
+
 #include <arch.h>
 #include <asm_macros.S>
 #include <cpu_macros.S>
-#include <css_def.h>
+#include <platform_def.h>
 
 	.weak	plat_secondary_cold_boot_setup
 	.weak	plat_get_my_entrypoint
diff --git a/plat/arm/css/common/aarch64/css_helpers.S b/plat/arm/css/common/aarch64/css_helpers.S
index 5096d8d..01669be 100644
--- a/plat/arm/css/common/aarch64/css_helpers.S
+++ b/plat/arm/css/common/aarch64/css_helpers.S
@@ -3,10 +3,11 @@
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
+
 #include <arch.h>
 #include <asm_macros.S>
 #include <cpu_macros.S>
-#include <css_def.h>
+#include <platform_def.h>
 
 	.weak	plat_secondary_cold_boot_setup
 	.weak	plat_get_my_entrypoint
diff --git a/plat/arm/css/common/css_bl2_setup.c b/plat/arm/css/common/css_bl2_setup.c
index c1c7868..6aefe03 100644
--- a/plat/arm/css/common/css_bl2_setup.c
+++ b/plat/arm/css/common/css_bl2_setup.c
@@ -10,8 +10,8 @@
 #include <common/debug.h>
 #include <lib/mmio.h>
 #include <lib/utils.h>
+#include <platform_def.h>
 
-#include <css_def.h>
 #include <plat_arm.h>
 
 #include "../drivers/scp/css_scp.h"