diff --git a/targets/TARGET_TOSHIBA/TARGET_TMPM4KN/PinNames.h b/targets/TARGET_TOSHIBA/TARGET_TMPM4KN/PinNames.h
index b332f7ddda9..f3916b221d5 100644
--- a/targets/TARGET_TOSHIBA/TARGET_TMPM4KN/PinNames.h
+++ b/targets/TARGET_TOSHIBA/TARGET_TMPM4KN/PinNames.h
@@ -106,8 +106,8 @@ typedef enum {
     SD_MOSI = MOSI, // Master out Salve in
 
     // I2C pins
-    SDA = D14,
-    SCL = D15,
+    SDA = PD3,
+    SCL = PD4,
 
     // Not connected
     NC = (int)0xFFFFFFFF,