diff --git a/plat/mediatek/mt8195/include/plat_sip_calls.h b/plat/mediatek/mt8195/include/plat_sip_calls.h
index 181aec0..ce25c6f 100644
--- a/plat/mediatek/mt8195/include/plat_sip_calls.h
+++ b/plat/mediatek/mt8195/include/plat_sip_calls.h
@@ -10,7 +10,11 @@
 /*******************************************************************************
  * Plat SiP function constants
  ******************************************************************************/
-#define MTK_PLAT_SIP_NUM_CALLS    2
+#define MTK_PLAT_SIP_NUM_CALLS    4
+
+/* DFD */
+#define MTK_SIP_KERNEL_DFD_AARCH32	0x82000205
+#define MTK_SIP_KERNEL_DFD_AARCH64	0xC2000205
 
 /* DP/eDP */
 #define MTK_SIP_DP_CONTROL_AARCH32	0x82000523