diff --git a/libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F4/TARGET_MTS_DRAGONFLY_F411RE/PinNames.h b/libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F4/TARGET_MTS_DRAGONFLY_F411RE/PinNames.h
index 5f25f3dd2c..8f49485a52 100644
--- a/libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F4/TARGET_MTS_DRAGONFLY_F411RE/PinNames.h
+++ b/libraries/mbed/targets/hal/TARGET_STM/TARGET_STM32F4/TARGET_MTS_DRAGONFLY_F411RE/PinNames.h
@@ -155,12 +155,20 @@ typedef enum {
     SERIAL_RX   = PA_3,
     SERIAL_RTS  = PA_1,
     SERIAL_CTS  = PA_0,
+    SERIAL_DCD  = D5,
+    SERIAL_DSR  = D8,
+    SERIAL_DTR  = D4,
+    SERIAL_RI   = D9,
     USBTX       = PB_6,
     USBRX       = PB_7,
     RADIO_TX    = PC_7,
     RADIO_RX    = PC_6,
     RADIO_RTS   = PB_10,
     RADIO_CTS   = PB_12,
+    RADIO_DCD   = D5,
+    RADIO_DSR   = D8,
+    RADIO_DTR   = D4,
+    RADIO_RI    = D9,
     I2C_SCL     = D15,
     I2C_SDA     = D14,
     SPI_MOSI    = PC_12,