diff --git a/plat/mediatek/mt8173/include/mt8173_def.h b/plat/mediatek/mt8173/include/mt8173_def.h
index 58962f0..378b4da 100644
--- a/plat/mediatek/mt8173/include/mt8173_def.h
+++ b/plat/mediatek/mt8173/include/mt8173_def.h
@@ -80,18 +80,6 @@
 #define PLAT_MT_CCI_CLUSTER0_SL_IFACE_IX	4
 #define PLAT_MT_CCI_CLUSTER1_SL_IFACE_IX	3
 
-/*******************************************************************************
- * WDT related constants
- ******************************************************************************/
-#define MTK_WDT_BASE		(RGU_BASE + 0)
-#define MTK_WDT_SWRST		(MTK_WDT_BASE + 0x0014)
-
-#define MTK_WDT_MODE_DUAL_MODE	0x0040
-#define MTK_WDT_MODE_IRQ	0x0008
-#define MTK_WDT_MODE_KEY	0x22000000
-#define MTK_WDT_MODE_EXTEN	0x0004
-#define MTK_WDT_SWRST_KEY	0x1209
-
 /* FIQ platform related define */
 #define MT_IRQ_SEC_SGI_0	8
 #define MT_IRQ_SEC_SGI_1	9
diff --git a/plat/mediatek/mt8173/include/plat_sip_calls.h b/plat/mediatek/mt8173/include/plat_sip_calls.h
index 88202cc..ce9951a 100644
--- a/plat/mediatek/mt8173/include/plat_sip_calls.h
+++ b/plat/mediatek/mt8173/include/plat_sip_calls.h
@@ -10,7 +10,7 @@
 /*******************************************************************************
  * Plat SiP function constants
  ******************************************************************************/
-#define MTK_PLAT_SIP_NUM_CALLS	6
+#define MTK_PLAT_SIP_NUM_CALLS	7
 
 #define MTK_SIP_PWR_ON_MTCMOS			0x82000402
 #define MTK_SIP_PWR_OFF_MTCMOS			0x82000403
@@ -18,5 +18,6 @@
 #define MTK_SIP_SET_HDCP_KEY_NUM		0x82000405
 #define MTK_SIP_CLR_HDCP_KEY			0x82000406
 #define MTK_SIP_SET_HDCP_KEY_EX			0x82000407
+#define MTK_SIP_SMC_WATCHDOG			0x82003D06
 
 #endif /* PLAT_SIP_CALLS_H */