diff --git a/plat/mediatek/include/mtk_sip_def.h b/plat/mediatek/include/mtk_sip_def.h
index 2039017..a86a46c 100644
--- a/plat/mediatek/include/mtk_sip_def.h
+++ b/plat/mediatek/include/mtk_sip_def.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022, MediaTek Inc. All rights reserved.
+ * Copyright (c) 2022-2023, MediaTek Inc. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -19,6 +19,9 @@
 	_func(MTK_SIP_DP_CONTROL, 0x523) \
 	_func(MTK_SIP_KERNEL_GIC_OP, 0x526)
 
+#define MTK_SIP_SMC_FROM_S_EL1_TABLE(_func) \
+	_func(MTK_SIP_TEE_MPU_PERM_SET, 0x031)
+
 #define MTK_SIP_SMC_FROM_BL33_TABLE(_func) \
 	_func(MTK_SIP_KERNEL_BOOT, 0x115)
 
diff --git a/plat/mediatek/include/mtk_sip_svc.h b/plat/mediatek/include/mtk_sip_svc.h
index ce51048..f677915 100644
--- a/plat/mediatek/include/mtk_sip_svc.h
+++ b/plat/mediatek/include/mtk_sip_svc.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2022, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2022-2023, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -55,11 +55,13 @@
 
 MTK_SIP_SMC_FROM_BL33_TABLE(SMC_ID_EXPAND_AS_EXTERN_SMC_INDEX);
 MTK_SIP_SMC_FROM_NS_EL1_TABLE(SMC_ID_EXPAND_AS_EXTERN_SMC_INDEX);
+MTK_SIP_SMC_FROM_S_EL1_TABLE(SMC_ID_EXPAND_AS_EXTERN_SMC_INDEX);
 
 /* Expand SiP SMC ID table as enum */
 enum {
 	MTK_SIP_SMC_FROM_BL33_TABLE(SMC_ID_EXPAND_AS_ENUM)
 	MTK_SIP_SMC_FROM_NS_EL1_TABLE(SMC_ID_EXPAND_AS_ENUM)
+	MTK_SIP_SMC_FROM_S_EL1_TABLE(SMC_ID_EXPAND_AS_ENUM)
 	MTK_SIP_SMC_MAX_NUMBER
 };