diff --git a/src/soc/mediatek/common/include/soc/wdt_common.h b/src/soc/mediatek/common/include/soc/wdt_common.h
index 5587d504e8..6d6d2ba758 100644
--- a/src/soc/mediatek/common/include/soc/wdt_common.h
+++ b/src/soc/mediatek/common/include/soc/wdt_common.h
@@ -32,6 +32,11 @@ enum {
 	MTK_WDT_MODE_ENABLE	= 1 << 0
 };
 
+/* WDT_RESTART */
+enum {
+	MTK_WDT_RESTART_KEY	= 0x1971
+};
+
 /* WDT_RESET */
 enum {
 	MTK_WDT_SWRST_KEY	= 0x1209,
diff --git a/src/soc/mediatek/common/wdt.c b/src/soc/mediatek/common/wdt.c
index 7ae4661011..663fc2fd30 100644
--- a/src/soc/mediatek/common/wdt.c
+++ b/src/soc/mediatek/common/wdt.c
@@ -1,6 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 #include <arch/cache.h>
+#include <delay.h>
 #include <device/mmio.h>
 #include <console/console.h>
 #include <halt.h>
@@ -23,7 +24,9 @@ static inline void mtk_wdt_swreset(void)
 	printk(BIOS_INFO, "%s() called!\n", __func__);
 
 	dcache_clean_all();
+	write32(&mtk_wdt->wdt_restart, MTK_WDT_RESTART_KEY);
 	setbits32(&mtk_wdt->wdt_mode, MTK_WDT_MODE_EXTEN | MTK_WDT_MODE_KEY);
+	udelay(100);
 	write32(&mtk_wdt->wdt_swrst, MTK_WDT_SWRST_KEY);
 
 	halt();