diff --git a/plat/mediatek/mt8186/include/plat_sip_calls.h b/plat/mediatek/mt8186/include/plat_sip_calls.h
index 598a5b8..9e3726b 100644
--- a/plat/mediatek/mt8186/include/plat_sip_calls.h
+++ b/plat/mediatek/mt8186/include/plat_sip_calls.h
@@ -10,6 +10,10 @@
 /*******************************************************************************
  * Plat SiP function constants
  ******************************************************************************/
-#define MTK_PLAT_SIP_NUM_CALLS    0
+#define MTK_PLAT_SIP_NUM_CALLS		(2)
+
+/* DFD */
+#define MTK_SIP_KERNEL_DFD_AARCH32	(0x82000205)
+#define MTK_SIP_KERNEL_DFD_AARCH64	(0xC2000205)
 
 #endif /* PLAT_SIP_CALLS_H */