diff --git a/targets/TARGET_NUVOTON/TARGET_M2351/PinNames.h b/targets/TARGET_NUVOTON/TARGET_M2351/PinNames.h
index cb88ad3a94..53ac662c1e 100644
--- a/targets/TARGET_NUVOTON/TARGET_M2351/PinNames.h
+++ b/targets/TARGET_NUVOTON/TARGET_M2351/PinNames.h
@@ -170,7 +170,9 @@ typedef enum {
     // Button naming
     SW2 = PB_0,
     SW3 = PB_1,
-    
+    BUTTON1 = SW2,
+    BUTTON2 = SW3,
+
 } PinName;
 
 #ifdef __cplusplus
diff --git a/targets/TARGET_NUVOTON/TARGET_M451/PinNames.h b/targets/TARGET_NUVOTON/TARGET_M451/PinNames.h
index 577ff8d28c..e64f2de337 100644
--- a/targets/TARGET_NUVOTON/TARGET_M451/PinNames.h
+++ b/targets/TARGET_NUVOTON/TARGET_M451/PinNames.h
@@ -131,7 +131,9 @@ typedef enum {
     // Button naming
     SW2 = PA_15,
     SW3 = PA_14,
-    
+    BUTTON1 = SW2,
+    BUTTON2 = SW3,
+
 } PinName;
 
 #ifdef __cplusplus
diff --git a/targets/TARGET_NUVOTON/TARGET_M480/PinNames.h b/targets/TARGET_NUVOTON/TARGET_M480/PinNames.h
index 36b043d57d..ca6c9a555d 100644
--- a/targets/TARGET_NUVOTON/TARGET_M480/PinNames.h
+++ b/targets/TARGET_NUVOTON/TARGET_M480/PinNames.h
@@ -136,8 +136,9 @@ typedef enum {
     SW2 = PF_11,
     SW3 = PG_5,
 #endif
-    
-    
+    BUTTON1 = SW2,
+    BUTTON2 = SW3,
+
 } PinName;
 
 #ifdef __cplusplus
diff --git a/targets/TARGET_NUVOTON/TARGET_NANO100/PinNames.h b/targets/TARGET_NUVOTON/TARGET_NANO100/PinNames.h
index 4658f5261b..01215d7ee0 100644
--- a/targets/TARGET_NUVOTON/TARGET_NANO100/PinNames.h
+++ b/targets/TARGET_NUVOTON/TARGET_NANO100/PinNames.h
@@ -128,7 +128,9 @@ typedef enum {
     // Button naming
     SW1 = PE_5,
     SW2 = PE_6,
-    
+    BUTTON1 = SW1,
+    BUTTON2 = SW2,
+
 } PinName;
 
 #ifdef __cplusplus
diff --git a/targets/TARGET_NUVOTON/TARGET_NUC472/PinNames.h b/targets/TARGET_NUVOTON/TARGET_NUC472/PinNames.h
index 333ada6663..b3f44eba65 100644
--- a/targets/TARGET_NUVOTON/TARGET_NUC472/PinNames.h
+++ b/targets/TARGET_NUVOTON/TARGET_NUC472/PinNames.h
@@ -134,7 +134,9 @@ typedef enum {
     // Button naming
     SW1 = PC_12,
     SW2 = PC_13,
-    
+    BUTTON1 = SW1,
+    BUTTON2 = SW2,
+
 } PinName;
 
 #ifdef __cplusplus