diff --git a/targets/TARGET_NUVOTON/TARGET_M2354/device/TOOLCHAIN_ARMC6/M2354.sct b/targets/TARGET_NUVOTON/TARGET_M2354/device/TOOLCHAIN_ARMC6/M2354.sct
index 1cf085a9da3..3c0138002fd 100644
--- a/targets/TARGET_NUVOTON/TARGET_M2354/device/TOOLCHAIN_ARMC6/M2354.sct
+++ b/targets/TARGET_NUVOTON/TARGET_M2354/device/TOOLCHAIN_ARMC6/M2354.sct
@@ -20,8 +20,12 @@
 
 #include "../partition_M2354_mem.h"
 
-#if !defined(MBED_BOOT_STACK_SIZE)
-#define MBED_BOOT_STACK_SIZE    0x400
+#if !defined(MBED_CONF_TARGET_BOOT_STACK_SIZE)
+#  if defined(MBED_BOOT_STACK_SIZE)
+#    define MBED_CONF_TARGET_BOOT_STACK_SIZE MBED_BOOT_STACK_SIZE
+#  else
+#    define MBED_CONF_TARGET_BOOT_STACK_SIZE 0x400
+#  endif
 #endif
 
 LR_IROM1    MBED_APP_START
@@ -34,7 +38,7 @@ LR_IROM1    MBED_APP_START
         .ANY (+RO)
     }
 
-    ARM_LIB_STACK   MBED_RAM_APP_START    EMPTY   MBED_BOOT_STACK_SIZE
+    ARM_LIB_STACK   MBED_RAM_APP_START    EMPTY   MBED_CONF_TARGET_BOOT_STACK_SIZE
     {
     }
 
diff --git a/targets/TARGET_NUVOTON/TARGET_M2354/device/TOOLCHAIN_GCC_ARM/M2354.ld b/targets/TARGET_NUVOTON/TARGET_M2354/device/TOOLCHAIN_GCC_ARM/M2354.ld
index 51d47e47293..0ae735279d3 100644
--- a/targets/TARGET_NUVOTON/TARGET_M2354/device/TOOLCHAIN_GCC_ARM/M2354.ld
+++ b/targets/TARGET_NUVOTON/TARGET_M2354/device/TOOLCHAIN_GCC_ARM/M2354.ld
@@ -22,11 +22,15 @@
 
 #include "../partition_M2354_mem.h"
 
-#if !defined(MBED_BOOT_STACK_SIZE)
-#define MBED_BOOT_STACK_SIZE    0x400
+#if !defined(MBED_CONF_TARGET_BOOT_STACK_SIZE)
+#  if defined(MBED_BOOT_STACK_SIZE)
+#    define MBED_CONF_TARGET_BOOT_STACK_SIZE MBED_BOOT_STACK_SIZE
+#  else
+#    define MBED_CONF_TARGET_BOOT_STACK_SIZE 0x400
+#  endif
 #endif
 
-StackSize = MBED_BOOT_STACK_SIZE;
+StackSize = MBED_CONF_TARGET_BOOT_STACK_SIZE;
 
 MEMORY
 {
diff --git a/targets/TARGET_NUVOTON/TARGET_M251/device/TOOLCHAIN_GCC_ARM/M251.ld b/targets/TARGET_NUVOTON/TARGET_M251/device/TOOLCHAIN_GCC_ARM/M251.ld
index bab17502f61..8fa5fc7e35c 100644
--- a/targets/TARGET_NUVOTON/TARGET_M251/device/TOOLCHAIN_GCC_ARM/M251.ld
+++ b/targets/TARGET_NUVOTON/TARGET_M251/device/TOOLCHAIN_GCC_ARM/M251.ld
@@ -21,7 +21,11 @@
 #include "../M251_mem.h"
 
 #if !defined(MBED_CONF_TARGET_BOOT_STACK_SIZE)
-#define MBED_CONF_TARGET_BOOT_STACK_SIZE    0x400
+#  if defined(MBED_BOOT_STACK_SIZE)
+#    define MBED_CONF_TARGET_BOOT_STACK_SIZE MBED_BOOT_STACK_SIZE
+#  else
+#    define MBED_CONF_TARGET_BOOT_STACK_SIZE 0x400
+#  endif
 #endif
 
 StackSize = MBED_CONF_TARGET_BOOT_STACK_SIZE;
diff --git a/targets/TARGET_NUVOTON/TARGET_M261/device/TOOLCHAIN_GCC_ARM/M261.ld b/targets/TARGET_NUVOTON/TARGET_M261/device/TOOLCHAIN_GCC_ARM/M261.ld
index 8d50c7e57ab..2d6d7bb29bc 100644
--- a/targets/TARGET_NUVOTON/TARGET_M261/device/TOOLCHAIN_GCC_ARM/M261.ld
+++ b/targets/TARGET_NUVOTON/TARGET_M261/device/TOOLCHAIN_GCC_ARM/M261.ld
@@ -23,7 +23,11 @@
 #include "../M261_mem.h"
 
 #if !defined(MBED_CONF_TARGET_BOOT_STACK_SIZE)
-  #define MBED_CONF_TARGET_BOOT_STACK_SIZE      0x400
+#  if defined(MBED_BOOT_STACK_SIZE)
+#    define MBED_CONF_TARGET_BOOT_STACK_SIZE MBED_BOOT_STACK_SIZE
+#  else
+#    define MBED_CONF_TARGET_BOOT_STACK_SIZE 0x400
+#  endif
 #endif
 
 M_CRASH_DATA_RAM_SIZE = 0x100;
diff --git a/targets/TARGET_NUVOTON/TARGET_M451/device/TOOLCHAIN_GCC_ARM/M453.ld b/targets/TARGET_NUVOTON/TARGET_M451/device/TOOLCHAIN_GCC_ARM/M453.ld
index c2a428bb868..1171d176eaa 100644
--- a/targets/TARGET_NUVOTON/TARGET_M451/device/TOOLCHAIN_GCC_ARM/M453.ld
+++ b/targets/TARGET_NUVOTON/TARGET_M451/device/TOOLCHAIN_GCC_ARM/M453.ld
@@ -23,7 +23,11 @@
 #include "../M451_mem.h"
 
 #if !defined(MBED_CONF_TARGET_BOOT_STACK_SIZE)
-  #define MBED_CONF_TARGET_BOOT_STACK_SIZE      0x400
+#  if defined(MBED_BOOT_STACK_SIZE)
+#    define MBED_CONF_TARGET_BOOT_STACK_SIZE MBED_BOOT_STACK_SIZE
+#  else
+#    define MBED_CONF_TARGET_BOOT_STACK_SIZE 0x400
+#  endif
 #endif
 
 StackSize = MBED_CONF_TARGET_BOOT_STACK_SIZE;
diff --git a/targets/TARGET_NUVOTON/TARGET_M460/device/TOOLCHAIN_GCC_ARM/M467.ld b/targets/TARGET_NUVOTON/TARGET_M460/device/TOOLCHAIN_GCC_ARM/M467.ld
index 31aa74c79d2..95b33e0b2d3 100644
--- a/targets/TARGET_NUVOTON/TARGET_M460/device/TOOLCHAIN_GCC_ARM/M467.ld
+++ b/targets/TARGET_NUVOTON/TARGET_M460/device/TOOLCHAIN_GCC_ARM/M467.ld
@@ -22,8 +22,12 @@
 
 #include "../M460_mem.h"
 
-#if !defined(MBED_BOOT_STACK_SIZE)
-#define MBED_BOOT_STACK_SIZE        0x400
+#if !defined(MBED_CONF_TARGET_BOOT_STACK_SIZE)
+#  if defined(MBED_BOOT_STACK_SIZE)
+#    define MBED_CONF_TARGET_BOOT_STACK_SIZE MBED_BOOT_STACK_SIZE
+#  else
+#    define MBED_CONF_TARGET_BOOT_STACK_SIZE 0x400
+#  endif
 #endif
 
 #if !defined(NU_HYPERRAM_START)
@@ -35,7 +39,7 @@
 #endif
 
 M_CRASH_DATA_RAM_SIZE = 0x100;
-StackSize = MBED_BOOT_STACK_SIZE;
+StackSize = MBED_CONF_TARGET_BOOT_STACK_SIZE;
 
 MEMORY
 {
diff --git a/targets/TARGET_NUVOTON/TARGET_M480/device/TOOLCHAIN_GCC_ARM/M487.ld b/targets/TARGET_NUVOTON/TARGET_M480/device/TOOLCHAIN_GCC_ARM/M487.ld
index 95f5a1e81aa..5e941482ba5 100644
--- a/targets/TARGET_NUVOTON/TARGET_M480/device/TOOLCHAIN_GCC_ARM/M487.ld
+++ b/targets/TARGET_NUVOTON/TARGET_M480/device/TOOLCHAIN_GCC_ARM/M487.ld
@@ -23,7 +23,11 @@
 #include "../M480_mem.h"
 
 #if !defined(MBED_CONF_TARGET_BOOT_STACK_SIZE)
-  #define MBED_CONF_TARGET_BOOT_STACK_SIZE      0x400
+#  if defined(MBED_BOOT_STACK_SIZE)
+#    define MBED_CONF_TARGET_BOOT_STACK_SIZE MBED_BOOT_STACK_SIZE
+#  else
+#    define MBED_CONF_TARGET_BOOT_STACK_SIZE 0x400
+#  endif
 #endif
 
 M_CRASH_DATA_RAM_SIZE = 0x100;
diff --git a/targets/TARGET_NUVOTON/TARGET_NANO100/device/TOOLCHAIN_GCC_ARM/NANO130.ld b/targets/TARGET_NUVOTON/TARGET_NANO100/device/TOOLCHAIN_GCC_ARM/NANO130.ld
index b21ae5e328c..ef96198d307 100644
--- a/targets/TARGET_NUVOTON/TARGET_NANO100/device/TOOLCHAIN_GCC_ARM/NANO130.ld
+++ b/targets/TARGET_NUVOTON/TARGET_NANO100/device/TOOLCHAIN_GCC_ARM/NANO130.ld
@@ -23,7 +23,11 @@
 #include "../NANO100_mem.h"
 
 #if !defined(MBED_CONF_TARGET_BOOT_STACK_SIZE)
-  #define MBED_CONF_TARGET_BOOT_STACK_SIZE      0x400
+#  if defined(MBED_BOOT_STACK_SIZE)
+#    define MBED_CONF_TARGET_BOOT_STACK_SIZE MBED_BOOT_STACK_SIZE
+#  else
+#    define MBED_CONF_TARGET_BOOT_STACK_SIZE 0x400
+#  endif
 #endif
 
 StackSize = MBED_CONF_TARGET_BOOT_STACK_SIZE;
diff --git a/targets/TARGET_NUVOTON/TARGET_NUC472/device/TOOLCHAIN_GCC_ARM/TARGET_NU_XRAM_SUPPORTED/NUC472.ld b/targets/TARGET_NUVOTON/TARGET_NUC472/device/TOOLCHAIN_GCC_ARM/TARGET_NU_XRAM_SUPPORTED/NUC472.ld
index 1f79334c311..043c8113952 100644
--- a/targets/TARGET_NUVOTON/TARGET_NUC472/device/TOOLCHAIN_GCC_ARM/TARGET_NU_XRAM_SUPPORTED/NUC472.ld
+++ b/targets/TARGET_NUVOTON/TARGET_NUC472/device/TOOLCHAIN_GCC_ARM/TARGET_NU_XRAM_SUPPORTED/NUC472.ld
@@ -11,7 +11,11 @@
 #endif 
 
 #if !defined(MBED_CONF_TARGET_BOOT_STACK_SIZE)
-  #define MBED_CONF_TARGET_BOOT_STACK_SIZE      0x400
+#  if defined(MBED_BOOT_STACK_SIZE)
+#    define MBED_CONF_TARGET_BOOT_STACK_SIZE MBED_BOOT_STACK_SIZE
+#  else
+#    define MBED_CONF_TARGET_BOOT_STACK_SIZE 0x400
+#  endif
 #endif
 
 M_CRASH_DATA_RAM_SIZE = 0x100;
diff --git a/targets/TARGET_NUVOTON/TARGET_NUC472/device/TOOLCHAIN_GCC_ARM/TARGET_NU_XRAM_UNSUPPORTED/NUC472.ld b/targets/TARGET_NUVOTON/TARGET_NUC472/device/TOOLCHAIN_GCC_ARM/TARGET_NU_XRAM_UNSUPPORTED/NUC472.ld
index 812eb93729c..c69d3f0635f 100644
--- a/targets/TARGET_NUVOTON/TARGET_NUC472/device/TOOLCHAIN_GCC_ARM/TARGET_NU_XRAM_UNSUPPORTED/NUC472.ld
+++ b/targets/TARGET_NUVOTON/TARGET_NUC472/device/TOOLCHAIN_GCC_ARM/TARGET_NU_XRAM_UNSUPPORTED/NUC472.ld
@@ -11,7 +11,11 @@
 #endif 
 
 #if !defined(MBED_CONF_TARGET_BOOT_STACK_SIZE)
-  #define MBED_CONF_TARGET_BOOT_STACK_SIZE      0x400
+#  if defined(MBED_BOOT_STACK_SIZE)
+#    define MBED_CONF_TARGET_BOOT_STACK_SIZE MBED_BOOT_STACK_SIZE
+#  else
+#    define MBED_CONF_TARGET_BOOT_STACK_SIZE 0x400
+#  endif
 #endif
 
 M_CRASH_DATA_RAM_SIZE = 0x100;