diff --git a/targets/TARGET_NORDIC/TARGET_NRF5/TARGET_MCU_NRF51822_UNIFIED/sdk_patch/sdk_config.h b/targets/TARGET_NORDIC/TARGET_NRF5/TARGET_MCU_NRF51822_UNIFIED/sdk_patch/sdk_config.h
index c39df0ae28..d9f72ee48f 100644
--- a/targets/TARGET_NORDIC/TARGET_NRF5/TARGET_MCU_NRF51822_UNIFIED/sdk_patch/sdk_config.h
+++ b/targets/TARGET_NORDIC/TARGET_NRF5/TARGET_MCU_NRF51822_UNIFIED/sdk_patch/sdk_config.h
@@ -7,10 +7,6 @@
 #define UART_DEFAULT_CONFIG_PARITY   UART0_CONFIG_PARITY
 #define UART_DEFAULT_CONFIG_HWFC     UART0_CONFIG_HWFC
 
-/* Use config at PinNames.h file in TARGET_XXXX directory */
-//#define CTS_PIN_NUMBER               UART0_CONFIG_PSEL_CTS
-//#define RTS_PIN_NUMBER               UART0_CONFIG_PSEL_RTS
-
 #define SPIS_DEFAULT_ORC                 NRF_DRV_SPIS_DEFAULT_ORC
 #define SPIS_DEFAULT_CONFIG_IRQ_PRIORITY SPIS1_CONFIG_IRQ_PRIORITY;
 #define SPIS_DEFAULT_ORC                 NRF_DRV_SPIS_DEFAULT_ORC