diff --git a/targets/TARGET_NUVOTON/TARGET_M451/watchdog_api.c b/targets/TARGET_NUVOTON/TARGET_M451/watchdog_api.c
index cf54a405d21..513df812a4f 100644
--- a/targets/TARGET_NUVOTON/TARGET_M451/watchdog_api.c
+++ b/targets/TARGET_NUVOTON/TARGET_M451/watchdog_api.c
@@ -188,7 +188,7 @@ static void watchdog_setup_cascade_timeout(void)
         WDT_CTL_WKEN_Msk |                                  // Enable wake-up on timeout
         WDT_CTL_IF_Msk |                                    // Clear interrupt flag
         WDT_CTL_RSTF_Msk |                                  // Clear reset flag
-        (wdt_timeout_rmn_clk ? 0 : WDT_CTL_RSTEN_Msk) |     // Enable reset on last cascaded timeout
+        WDT_CTL_RSTEN_Msk |                                 // Enable reset always to address cascaded timeout failure in interrupt disabled scenario e.g. Hard Fault
         WDT_CTL_RSTCNT_Msk;                                 // Reset watchdog timer
 
     SYS_LockReg();
diff --git a/targets/TARGET_NUVOTON/TARGET_M480/watchdog_api.c b/targets/TARGET_NUVOTON/TARGET_M480/watchdog_api.c
index a61bb6909e6..f678a606095 100644
--- a/targets/TARGET_NUVOTON/TARGET_M480/watchdog_api.c
+++ b/targets/TARGET_NUVOTON/TARGET_M480/watchdog_api.c
@@ -188,7 +188,7 @@ static void watchdog_setup_cascade_timeout(void)
         WDT_CTL_WKEN_Msk |                                  // Enable wake-up on timeout
         WDT_CTL_IF_Msk |                                    // Clear interrupt flag
         WDT_CTL_RSTF_Msk |                                  // Clear reset flag
-        (wdt_timeout_rmn_clk ? 0 : WDT_CTL_RSTEN_Msk) |     // Enable reset on last cascaded timeout
+        WDT_CTL_RSTEN_Msk |                                 // Enable reset always to address cascaded timeout failure in interrupt disabled scenario e.g. Hard Fault
         WDT_CTL_RSTCNT_Msk;                                 // Reset watchdog timer
 
     SYS_LockReg();
diff --git a/targets/TARGET_NUVOTON/TARGET_NANO100/watchdog_api.c b/targets/TARGET_NUVOTON/TARGET_NANO100/watchdog_api.c
index 288e9367fb2..5fde964827f 100644
--- a/targets/TARGET_NUVOTON/TARGET_NANO100/watchdog_api.c
+++ b/targets/TARGET_NUVOTON/TARGET_NANO100/watchdog_api.c
@@ -193,7 +193,7 @@ static void watchdog_setup_cascade_timeout(void)
         wdt_timeout_clk_toutsel |                           // Timeout interval
         WDT_CTL_WTE_Msk |                                   // Enable watchdog timer
         WDT_CTL_WTWKE_Msk |                                 // Enable wake-up on timeout
-        (wdt_timeout_rmn_clk ? 0 : WDT_CTL_WTRE_Msk) |      // Enable reset on last cascaded timeout
+        WDT_CTL_WTRE_Msk |                                  // Enable reset always to address cascaded timeout failure in interrupt disabled scenario e.g. Hard Fault
         WDT_CTL_WTR_Msk;                                    // Reset watchdog timer
     
     SYS_LockReg();
diff --git a/targets/TARGET_NUVOTON/TARGET_NUC472/watchdog_api.c b/targets/TARGET_NUVOTON/TARGET_NUC472/watchdog_api.c
index 01fb436b2ec..5910e758fe6 100644
--- a/targets/TARGET_NUVOTON/TARGET_NUC472/watchdog_api.c
+++ b/targets/TARGET_NUVOTON/TARGET_NUC472/watchdog_api.c
@@ -187,7 +187,7 @@ static void watchdog_setup_cascade_timeout(void)
         WDT_CTL_WKEN_Msk |                                  // Enable wake-up on timeout
         WDT_CTL_IF_Msk |                                    // Clear interrupt flag
         WDT_CTL_RSTF_Msk |                                  // Clear reset flag
-        (wdt_timeout_rmn_clk ? 0 : WDT_CTL_RSTEN_Msk) |     // Enable reset on last cascaded timeout
+        WDT_CTL_RSTEN_Msk |                                 // Enable reset always to address cascaded timeout failure in interrupt disabled scenario e.g. Hard Fault
         WDT_CTL_RSTCNT_Msk;                                 // Reset watchdog timer
 
     SYS_LockReg();