diff --git a/libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F030R8/PinNames.h b/libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F030R8/PinNames.h
index 756d94a6ca..36bc140742 100644
--- a/libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F030R8/PinNames.h
+++ b/libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F030R8/PinNames.h
@@ -148,6 +148,8 @@ typedef enum {
     LED3        = PA_5,
     LED4        = PA_5,
     USER_BUTTON = PC_13,
+    SERIAL_TX   = PA_2,
+    SERIAL_RX   = PA_3,
     USBTX       = PA_2,
     USBRX       = PA_3,
     I2C_SCL     = PB_8,
diff --git a/libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/PinNames.h b/libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/PinNames.h
index 0a048d021e..1fd8048cb1 100644
--- a/libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/PinNames.h
+++ b/libraries/mbed/targets/hal/TARGET_STM/TARGET_NUCLEO_F103RB/PinNames.h
@@ -138,6 +138,8 @@ typedef enum {
     LED3        = PA_5,
     LED4        = PA_5,
     USER_BUTTON = PC_13,
+    SERIAL_TX   = PA_2,
+    SERIAL_RX   = PA_3,
     USBTX       = PA_2,
     USBRX       = PA_3,
     I2C_SCL     = PB_8,