diff --git a/targets/TARGET_NUVOTON/TARGET_M480/PinNames.h b/targets/TARGET_NUVOTON/TARGET_M480/PinNames.h
index d23085835f..36b043d57d 100644
--- a/targets/TARGET_NUVOTON/TARGET_M480/PinNames.h
+++ b/targets/TARGET_NUVOTON/TARGET_M480/PinNames.h
@@ -131,10 +131,12 @@ typedef enum {
     // Button naming
 #if TARGET_NUMAKER_PFM_M487
     SW2 = PG_15,
-#elif TARGET_NUMAKER_IOT_M487
-    SW2 = PG_5,
-#endif
     SW3 = PF_11,
+#elif TARGET_NUMAKER_IOT_M487
+    SW2 = PF_11,
+    SW3 = PG_5,
+#endif
+    
     
 } PinName;