diff --git a/targets/TARGET_TOSHIBA/TARGET_TMPM4KN/spi_api.c b/targets/TARGET_TOSHIBA/TARGET_TMPM4KN/spi_api.c
index a866d062a7..d0a7220fa6 100644
--- a/targets/TARGET_TOSHIBA/TARGET_TMPM4KN/spi_api.c
+++ b/targets/TARGET_TOSHIBA/TARGET_TMPM4KN/spi_api.c
@@ -48,11 +48,13 @@ static const PinMap PinMap_SPI_SLAVE_SCLK[] = {
 static const PinMap PinMap_SPI_SSEL[] = {
     {PA1,  SPI_0, PIN_DATA(1, 1)},
     {PG1,  SPI_1, PIN_DATA(1, 1)},
+    {NC,  NC,    0}
 };
 
 static const PinMap PinMap_SPI_SLAVE_SSEL[] = {
     {PA0,  SPI_0, PIN_DATA(1, 0)},
     {PG3,  SPI_1, PIN_DATA(1, 0)},
+    {NC,  NC,    0}
 };
 
 void spi_init(spi_t *obj, PinName mosi, PinName miso, PinName sclk, PinName ssel)
diff --git a/targets/targets.json b/targets/targets.json
index cd27872e50..3527f802dd 100644
--- a/targets/targets.json
+++ b/targets/targets.json
@@ -8953,7 +8953,6 @@
         "extra_labels": ["TOSHIBA"],
         "macros": ["__TMPM4KN__"],
         "supported_toolchains": ["GCC_ARM","ARMC6"],
-        "printf_lib": "std",
         "device_has": [
             "ANALOGIN",
 	    "INTERRUPTIN",