diff --git a/hal/targets/hal/TARGET_STM/TARGET_STM32L1/PeripheralPins.h b/hal/targets/hal/TARGET_STM/TARGET_STM32L1/PeripheralPins.h
index cc2fcaaf11..99f00a5591 100644
--- a/hal/targets/hal/TARGET_STM/TARGET_STM32L1/PeripheralPins.h
+++ b/hal/targets/hal/TARGET_STM/TARGET_STM32L1/PeripheralPins.h
@@ -55,6 +55,8 @@ extern const PinMap PinMap_PWM[];
 
 extern const PinMap PinMap_UART_TX[];
 extern const PinMap PinMap_UART_RX[];
+extern const PinMap PinMap_UART_RTS[];
+extern const PinMap PinMap_UART_CTS[];
 
 //*** SPI ***